What Are Feed Additives and How Do They Benefit Livestock?

18 Aug.,2025

 

What Are Feed Additives and How Do They Benefit Livestock?

Feed additives play a crucial role in the livestock industry by enhancing animal health, productivity, and overall efficiency. These additives are designed to improve feed utilization, support growth, and prevent diseases, which are essential components of sustainable animal farming. By ensuring optimal nutrition and reducing reliance on antibiotics, feed additives contribute to the production of safer and healthier food for consumers.

This article will explore various types of feed additives, including probiotics, enzymes, and organic acids. It will also discuss their benefits, such as promoting gut health, boosting immunity, and improving feed conversion rates.
 

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What are Feed Additives?

Feed additives are essential components of animal nutrition, designed to enhance health, optimize growth, and improve feed efficiency. Non-medicated feed additives include various types that serve specific purposes. For instance, microorganisms support gut health and enhance nutrient absorption, while enzymes aid in breaking down complex nutrients for better digestion. Preservatives and antioxidants help maintain feed quality and extend shelf life. Iodized proteins supply essential iodine for thyroid function, and acidity regulators help balance pH levels to promote digestive health. Quality enhancers improve the palatability and texture of feed, while aquaculture and livestock technical additives cater to specific farming needs.

On the other hand, the most common medicated additives are antibiotic growth promoters (AGPs), traditionally been used to boost growth and prevent disease. However, their use is declining due to concerns regarding antimicrobial resistance. Whether medicated or non-medicated, feed additives play a vital role in sustainable and efficient animal production systems.
 

Types of Feed Additives

Feed additives are classified into several categories, each serving a unique purpose in animal nutrition and health. Technological additives improve feed processing, stability, and preservation (e.g., preservatives, antioxidants, and emulsifiers). Sensory additives enhance the taste, color, or aroma of feed, making it more appealing to animals. Nutritional additives provide essential nutrients such as vitamins, minerals, and amino acids, ensuring proper growth and health. Other categories include zootechnical additives, which enhance performance and digestion (e.g., microorganisms and enzymes), and coccidiostats, which help control specific diseases.

Each type of additive plays a crucial role in enhancing feed efficiency and promoting animal welfare. Continue reading to learn how these additives benefit contemporary livestock farming.
 

Technological Additives

Technological additives are substances specifically incorporated into animal feed to enhance its physical properties, thereby ensuring better handling, processing, and storage. These additives play a crucial role in maintaining feed stability, preventing spoilage, and preserving its nutritional value over time. For example, preservatives inhibit the growth of mold and harmful bacteria, while antioxidants protect feed from oxidative damage, thereby ensuring the quality of fats and vitamins. Additionally, binders and pelletizing agents improve feed texture and consistency of feed, making it easier to manufacture and consume. Other examples include emulsifiers, which enhance the mixing of ingredients, and anticaking agents, which prevent clumping during storage. By optimizing the physical characteristics of feed, technological additives contribute to more efficient feed production, reduced waste, and improved animal nutrition, ultimately supporting the sustainability of livestock farming.
 

Sensory Additives

Sensory additives are substances added to animal feed to enhance its taste, aroma, and overall palatability, thereby encouraging animals to consume more feed and meet their nutritional requirements. These additives play a key role in improving feed intake, especially in situations where the feed may be less appealing due to changes in ingredients or processing. Common examples of sensory additives include flavoring agents, which mask unpleasant odors or enhance natural flavors, and sweeteners, which make the feed more palatable for young animals or those with reduced appetite. Colorants are also used in some cases to make the feed visually attractive, particularly in aquaculture, where feed appearance can influence consumption. By enhancing feed appeal, sensory additives contribute to better nutrient intake, healthier growth, and higher productivity in livestock and aquaculture.
 

Nutritional Additives

Nutritional additives are essential substances added to animal feed to supplement nutrients that may be insufficient in basic feed ingredients. These additives ensure that animals receive a balanced diet to support growth, reproduction, and overall health. Common examples include vitamins, such as Vitamin A for vision and immune function, and Vitamin D for bone development. Minerals like calcium and phosphorus are critical for skeletal health, while trace minerals such as zinc, selenium, and manganese are necessary for various metabolic processes. Amino acids like lysine and methionine, are also added to enhance protein synthesis and improve growth efficiency. Additionally, fatty acids may be included to support energy needs and maintain healthy skin and coat. By addressing nutritional deficiencies, these additives play a vital role in optimizing animal performance, enhancing feed efficiency, and promoting sustainable livestock production.
 

Zootechnical Additive

Zootechnical additives are substances included in animal feed to enhance overall health, improve digestion, and boost performance. These additives are crucial in ensuring animal well-being and optimizing productivity by addressing specific health or physiological needs. Common examples include probiotics, which promote a healthy gut microbiome by increasing beneficial bacteria and reducing harmful pathogens, and prebiotics, which serve as food for beneficial gut microbes, thereby enhancing digestive efficiency. Enzymes are another type, aiding in the breakdown of complex feed components like fiber and starch, improving nutrient absorption. Phytogenic additives, derived from plants, have a lot of functions such as reducing inflammation, relieving stress, enhancing immunity, and killing microorganisms. Additionally, immunomodulators enhance the animal's natural defense mechanisms, thereby reducing the risk of disease. By focusing on animal health and performance, zootechnical additives contribute to efficient and sustainable livestock farming while minimizing reliance on antibiotics.
 

Coccidiostats and Histomonostats

Coccidiostats and histomonostats are specialized feed additives designed to control parasitic infections in poultry and other livestock, thereby ensuring animal health and enhancing farm productivity. Coccidiostats specifically target coccidiosis, a prevalent disease caused by Eimeria parasites that damage the intestinal lining, resulting in poor nutrient absorption, diarrhea, and reduced growth rates. These additives function by inhibiting the life cycle of the parasites, preventing outbreaks, and minimizing economic losses.

Histomonostats, on the other hand, are utilized to combat histomoniasis, also known as blackhead disease, which primarily affects turkeys and chickens. This condition is caused by the protozoan Histomonas meleagridis, leading to severe liver and intestinal damage. By suppressing the growth and activity of these parasites, histomonostats help maintain animal health and preventing mortality.

Both types of additives play a crucial role in integrated parasite management strategies, promoting sustainable and efficient livestock production.

 

Benefits of Using Feed Additives

Feed additives offer numerous benefits that play a vital role in modern livestock production. They enhance animal health, improve feed efficiency, and support better nutrient absorption, leading to stronger immune systems and healthier growth. By optimizing feed utilization, additives reduce waste and improve overall farm productivity. These improvements not only ensure animal well-being but also bring significant economic advantages to farmers through higher yields and reduced production costs.

In the following sections, we will explore feed additives designed for various purposes and examine how they contribute to the success of modern livestock farming.
 

Improving Animal Health

Feed additives can help strengthen the immune systems of animals, resist infections, and maintain overall health. Certain additives, such as probiotics and prebiotics, promote a balanced gut microbiome, which is essential for a strong immune response. Vitamins like vitamin E and C, and minerals such as zinc and selenium, act as antioxidants, reducing oxidative stress and enhancing immune function. Other additives, including immunomodulators and phytogenic compounds, directly stimulate the immune system, making animals more resilient to diseases.

By supporting immune health, feed additives help reduce the incidence of infections and minimize the need for antibiotics, thereby contributing to more sustainable farming practices. Additionally, healthier animals experience better growth and productivity, leading to improved farm efficiency and profitability. The integration of these additives into animal feed is a proactive approach to ensuring robust health and disease prevention in livestock.



 

Enhancing Feed Efficiency

Feed additives enhance feed efficiency, enabling animals to produce more meat, milk, or eggs from the same amount of feed. This efficiency is achieved by improving nutrient digestion and absorption, ensuring that animals fully utilize the energy and nutrients in their diet. For example, cellulase enzymes help break down complex fibers in plant materials, making them more digestible, while amylase assists in the breakdown of starches. Probiotics, such as Lactobacillus and Bifidobacterium, promote a healthy gut environment by balancing the gut microbiota, improving digestion and nutrient absorption. Prebiotics, like fructooligosaccharides (FOS), provide nourishment for beneficial gut bacteria, further enhancing feed conversion rates.

By maximizing the output from each unit of feed, these additives reduce feed wastage and help farmers lower production costs, as feed typically represents the largest expense in livestock operations. Better feed efficiency also supports sustainable farming by decreasing the environmental impact of animal production, benefiting both farmers and the planet.

 

Reducing Environmental Impact

Feed additives not only improve animal nutrition but also support the creation of more sustainable livestock production systems, reduce pollution, and promote sustainable agriculture. By incorporating probiotics into animal feed, producers can improve gut health and feed efficiency, thereby reducing methane emissions from ruminants like cattle. Similarly, natural additives such as yucca extract have shown effectiveness in minimizing ammonia emissions, which are a primary cause of odor and air pollution in pig and poultry farms. These solutions not only enhance air quality but also contribute to better living conditions for both animals and farm workers. Additionally, improved nutrient absorption through feed additives reduces nutrient waste, lessening the burden on soil and water ecosystems. By adopting such innovative products, the livestock industry can achieve sustainable growth while addressing environmental challenges like greenhouse gas emissions and air pollution.
 

Economic Benefits for Farmers

By improving animal health, enhancing feed efficiency, and boosting production, feed additives provide farmers opportunities to increase profits. Healthier animals utilize feed more effectively, converting it into meat, milk, or eggs at higher rates, which directly reduces feed costs. Moreover, by strengthening the immune systems of livestock and poultry, feed additives lower the need for medications, cutting veterinary expenses significantly. This not only decreases operational costs but also improves overall productivity on the farm. With better growth rates and higher yields, farmers can achieve greater returns on their investment. Additionally, fewer sick animals mean more consistent production and fewer disruptions, allowing farms to operate more efficiently. By optimizing resources and ensuring sustainable practices, feed additives create a pathway for farmers to improve profitability while maintaining high standards of animal welfare and productivity.
 

Regulations and Safety of Feed Additives

Feed additives are regulated to ensure their safety for animals, humans, and the environment. Different countries implement specific standards and approval processes. For instance, the European Union (EU) banned the use of antibiotic growth promoters (AGPs) in , emphasizing consumer safety and minimizing antimicrobial resistance risks. Regulatory agencies, such as the U.S. Food and Drug Administration (FDA) and the EU’s European Food Safety Authority (EFSA), evaluate feed additives for their efficacy, safety, and environmental impact. These regulations ensure that only approved substances are used, thereby protecting public health and promoting sustainable livestock farming practices.
 

How to Choose the Right Feed Additives?

Choosing the right feed additive involves understanding of your specific livestock needs, production goals, and local regulations. Consider factors such as the additive’s purpose, whether for improving health, enhancing feed efficiency, or reducing environmental impact. Evaluating product quality, scientific backing, and compatibility with your feeding program is crucial. Additionally, consult experts or veterinarians for tailored recommendations. In the following sections, we’ll explore key factors to help you make informed decisions and maximize the benefits of feed additives in your farming operations.
 

Understanding Your Livestock's Specific Needs

The first step in selecting the right feed additives is to understand the specific nutritional needs of your animals, which vary depending on factors like species, age, stage of production, and environmental conditions. For example, laying hens have different nutritional requirements during growth, peak egg production, and old age. During the growth phase, they require protein-rich additives, vitamins, and minerals to support their development. In the laying phase, calcium and phosphorus are essential for maintaining eggshell strength, while enzymes and amino acids help optimize nutrient absorption. For older hens, antioxidants, probiotics, and prebiotics support health and maintain egg production. Additionally, during summer, anti-stress additives are necessary to maintain comfort and optimal performance. When mycotoxins are present in the feed, mycotoxin detoxifiers are crucial to prevent health issues. Tailoring additives based on these factors ensures optimal performance and health throughout their lifecycle.


 

Regulatory Compliance and Safety

When selecting feed additives, it is crucial to ensure that they meet all relevant regulations and safety standards. This includes verifying their approval for specific livestock species, checking for any usage restrictions, and ensuring compliance with residue limits in animal products. In regions like the European Union, the use of antibiotic growth promoters (AGPs) has been banned since due to concerns regarding antimicrobial resistance. Instead, farmers must use non-antibiotic alternatives like enzymes, organic acids, or phytogenic compounds.

For instance, additives such as coccidiostats are permitted in some cases but must adhere to strict dosage and withdrawal requirements to avoid residues in meat or eggs. In the United States, the FDA mandates rigorous safety and efficacy evaluations before approving any additive, including those used for environmental purposes like 3-NOP. Farmers should always consult local regulatory guidelines and seek professional advice to ensure compliance and safety before using feed additives.
 

Consider Cost-Effectiveness and Return on Investment

Feed additives offer significant economic benefits by enhancing animal performance, feed efficiency, and overall farm profitability. Their value lies in optimizing resource utilization and improving productivity. For instance, enzymes can break down complex feed components, thereby increasing nutrient availability and reducing feed waste, thus lowering feed costs—often the largest expense in livestock farming. Similarly, additives like amino acids and vitamins support optimal growth rates, reducing time to market.
 
The potential return on investment (ROI) for feed additives depends on their impact on animal health and productivity. Additives that enhance immune function can decrease veterinary costs and minimize production losses due to disease outbreaks. As an alternative to AGPs, Surfactin (main ingredient of Muco-defen®), a biosurfactant produced by Bacillus species, has demonstrated antimicrobial properties and immune-boosting effects. It promotes gut health, supports optimal nutrient absorption, and sustains animal performance, meeting the demand for antibiotic-free production systems.

Conducting a thorough cost-benefit analysis and aligning additive choices with specific production goals allow farmers to maximize profitability while ensuring ethical and sustainable farming practices.

 

Evaluating the Quality of Feed Additives

To ensure the effective use of feed additives, it is important to select products from reputable manufacturers that comply with rigorous quality standards. Ensuring that the additives produced in facilities with recognized certifications, such as FAMI-QS (Feed Additive and Premixture Quality System) or GMP+ (Good Manufacturing Practices Plus), helps maintain product safety and consistency. These certifications confirm adherence to international safety and quality protocols throughout the production, storage, and distribution processes. For Muslim consumers, selecting products with Halal certification ensures compliance with dietary and religious requirements.

Using additives from trusted sources minimizes the risks associated with contamination, substandard quality, and non-compliance with regulations. By prioritizing certified products, farmers and producers can enhance animal performance while maintaining consumer confidence and regulatory compliance.
 

Consult with a Livestock Nutrition Expert

Selecting the right feed additives can be a complex process, requiring careful consideration of animal needs, regulatory compliance, and farm objectives. Consulting with experts is an effective way to navigate these challenges and identifying solutions tailored to specific requirements. Expert advice helps ensure optimal performance, compliance with industry standards, and cost-effectiveness in additive selection.

Life Rainbow offers free consultation services to support farmers informed decisions about feed additives. With extensive expertise in antibiotic-free feed solutions and sustainable farming practices, Life Rainbow provides professional guidance and customized recommendations for enhancing animal health and farm productivity.

If you have any questions or require assistance in choosing feed additives, feel free to contact Life Rainbow. Our team is ready to collaborate and support your agricultural needs with innovative and reliable solutions.
 

Experience the Difference with Life Rainbow Biotech's Feed Additives

Life Rainbow offers a range of feed additives designed to support animal health and promote sustainable farming. Each product has distinct features and advantages:

Toxi-free plus®: This product focuses on mycotoxin management, protecting animals from the adverse effects of mycotoxins commonly found in contaminated feed. It contains patented mycotoxin-degrading enzymes, essential oils, and adsorbents ensuring to provide multi-strategies against various mycotoxins.

Muco-defen® & Muco-defen® (water-soluble): Designed to enhance gut health, Muco-defen® combines quantified surfactin produced through patented Bacillus solid-state fermentation, along with probiotics and specially selected herbal extracts. It significantly improves gut health, boosts immunity, and offers powerful antimicrobial properties in animals.

Easy-immune®: This product boosts the immune system through active compounds like Cordycepin and Cordyceps polysaccharides. Cordycepin, a nucleoside analog, uses structural competition to interfere with viral replication. Cordyceps polysaccharides stimulate immune cell activity, thereby strengthening the immune system and enhancing the animal's natural defenses.

Gano-met®: The Ganoderma extract (e.g., Ganoderma polysaccharides) in Gano-met® can effectively boost the immune system, enabling poultry to better resist diseases and infections. Additionally, Ganoderma extract achieves antioxidant effects by increasing the levels of antioxidant enzymes in the body to reduce oxidative stress.

Life Rainbow’s feed additives provide comprehensive solutions tailored to meet the needs of modern livestock and poultry farming.

Conclusion

In conclusion, feed additives are essential for improving animal health, enhancing farm productivity, and fostering sustainable agriculture. Life Rainbow stands out as a reliable partner, offering premium, science-backed solutions. With certifications like FAMI-QS (Feed Additive and Premixture Quality System), ISO (Requirements for Testing Laboratories), ISO (Food Safety Management Systems), ISO (Environmental Management Systems), and Halal Certificate (Certification for compliance with Halal requirements according to Islamic law), Life Rainbow ensures unmatched quality, safety, and adherence to international standards.

By focusing on innovation and sustainability, Life Rainbow supports farmers in achieving outstanding results while meeting regulatory and market demands. For expert guidance or to learn more about our certified feed additives, contact Life Rainbow Biotech and take the first step toward optimizing your livestock operations.


 


Reference:

Feed Additives for Dairy Cattle - DAIReXNET

Contents

  • 1 Introduction
  • 2 Evaluating Feed Additives at the Farm Level (4 R’s)
  • 3 Evaluating Feed Additives at the Industry Level (7 R’s)
  • 4 Feed Additive Guidelines
  • 5 Literature Cited
  • 6 Author Information

Introduction

Feeding high-producing cows continues to challenge dairy farmers and nutritionists. Also, dairy profit margins vary as milk prices and feed costs shift yearly. Feed costs represent the largest input cost to produce milk (estimated to be 35 to 50 percent). Feed additives are a group of feed ingredients that can cause a desired animal response in a non-nutrient role, such as pH shift, growth, or metabolic modifier (Hutjens, ). Several feed additives contain nutrients, such as sodium in sodium bicarbonate or protein in yeast culture. Feed additives are not a requirement, nor are they a guarantee for high productivity or profitability.

Take-Home Messages

  • Dairy managers must evaluate each feed additive based on the “4 R” approach.
  • Feed manufacturers should add an additional “3 R’s” when selecting feed additives.
  • Each dairy manager must evaluate the choices of available feed additives and determine if a product is warranted.

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Evaluating Feed Additives at the Farm Level (4 R’s)

Four factors can be considered to determine if a feed additive should be used: anticipated response, economic return, available research, and field responses (Hutjens, ). Response refers to expected performance changes the user could expect or anticipate when a feed additive is included. Several examples are listed below:

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  • Higher milk yield (peak milk and/or milk persistency)
  • Increase in milk components (protein and/or fat)
  • Greater dry matter intake
  • Stimulate rumen microbial synthesis of protein and/or volatile fatty acid (VFA) production
  • Increase digestion in the digestive tract
  • Stabilize rumen environment and pH
  • Improve growth (gain and/or feed efficiency)
  • Reduce heat stress effects
  • Improve health (such as less ketosis, reduce acidosis, or improve immune response)

Returns reflect the profitability of using a selected additive. If milk improvement is the measurable response, a break-even point can be calculated. For example, a consultant recommends an additive that raises feed cost 10 cents per day. If milk is valued at 12 cents per .45 kg, every cow must produce .38 kg more milk to cover the added cost associated with the additive.

Another consideration is if all cows receive the additive, but only cows fresh less than 100 days respond. Responding cows must cover the additive costs for all cows (responsive and nonresponsive cows). One guideline is an additive should return $2 or more for each dollar invested to cover nonresponsive cows and field conditions that could minimize the anticipated response.

Research is essential to determine if experimentally measured responses can be expected in the field. Studies should be conducted under controlled and unbiased conditions, have statistically analyzed results (to determine whether the differences are repeatable), and have been conducted under experimental designs that would be similar to field situations.

Results obtained on individual farms are the economic payoff. Dairy managers and nutritionists must have data to compare and measure responses. Several tools to measure results (to evaluate responses on a farm) include DHI milk records (peak milk, persistency, milk components, and milk curves), reproductive summaries, somatic cell count data, dry matter intake, heifer growth charts, body condition graphs, and herd health profiles, which will allow critical evaluation of a selected additive.

Evaluating Feed Additives at the Industry Level (7 R’s)

Feed industry personnel and consultants may evaluate feed additives using a slightly different approach; the 7 R’s include the basic 4 R’s as listed above, plus reliability, repeatability, and relativity.

Reliability is based on the research database that has been published on a feed additive:

  • the ability to predict that the product can have a positive response of a wide range of feeding
  • establish a normal curve of response in various studies
  • minimize the risk of not obtaining a positive benefit to cost ration

Repeatability represents the statistical data results (mean and standard deviation). Each feed consultant must determine what level of risk he will assume when selecting each feed additive. The bottom line is the probability of a profitable response.

Relativity refers to other products, management changes, or on-farm practices that could replace the feed additive being used. For example, an anionic product could be removed if the nutritionist could reduce close ration levels of potassium to less than 1 percent, adapt a “no dry period” for third- and over-lactation cows, and/or drench each three lactation cows with a calcium gel product.

A second aspect of industry selection of a feed additive is which commercial product should be purchased. “Me too syndrome” is a term referring to products that have limited research and results, but are marketed on the concept that the products are identical to the industry-based standard. One example is sodium bicarbonate, a chemically defined product that has no unique processing to make it more soluble or rumen active versus inert.

Feed Additive Guidelines

Interest in feed additives will continue and will be influenced by new research results, advertising, and profit margins. Table 1 outlines additives in six categories with information that will assist dairy farmers, consultants, feed company nutritionists, and veterinarians in deciding whether an additive should be included. Current status is classified in the following ways:

  • Recommended: include as needed
  • Experimental: additional research and study are needed
  • Evaluative: monitor on individual and specific situations
  • Not recommended: lacks economic responses to currently use
Table 1. Feed additive guidelines for dairy cows. Anionic Salts and Products 1. Function: Cause the diet to be more acidic, increasing blood calcium levels by stimulating bone mobilization of calcium and calcium absorption from the small intestine. 2. Level: Reduce DCAD to –50 meq/kg using chloride sources (calcium chloride, ammonium chloride, Bio Chor, Animate, Soy Chor 44, Soy Chor 16, Nutro Clor, and hydrochloric acid treated feeds). 3. Cost: 40 to 75 cents per dry cow per day depending on product used 4. Benefit to Cost Ratio: 10:1 5. Feeding strategy: Feed to dry cows two to three weeks before calving. Adjust dietary calcium levels to 150 grams per day (50 grams inorganic). Raise dietary magnesium levels to 0.4%. 6. Status: Recommended Aspergillus oryzae 1. Function: Stimulate fiber-digesting bacteria, stabilize rumen pH, and reduce heat stress. 2. Level: 3 grams per day 3. Cost: 3 cents per cow per day 4. Benefit to Cost Ratio: 6:1 5. Feeding strategy: High grain diets, low rumen pH conditions, and under heat stress (cows) and calves receiving a liquid diet. 6. Status: Evaluative Biotin 1. Function: Improve hooves by reducing heel warts, claw lesions, white line separations, sand cracks, and sole ulcers and increase milk yield through a metabolic route. 2. Level: 10 to 20 milligrams per cow per day for six months to one year 3. Cost: 8 to 10 cents per cow per day 4. Benefit to Cost Ratio: 4:1 5. Feeding strategy: Herds with chronic foot problems may require supplementation for six months before evaluation, and company recommends beginning supplementation at 15 months of age. 6. Status: Recommended β-carotene 1. Function: Improve reproductive performance, immune response, and mastitis control. 2. Level: 200 to 300 mg per day 3. Cost: 10 cents per cow per day 4. Benefit to Cost Ratio: Not available 5. Feeding strategy: In early lactation and during mastitis-prone time periods 6. Status: Not recommended Calcium Propionate 1. Function: Increase blood glucose and calcium levels. 2. Level: 120 to 225 grams 3. Cost: 80 cents per 454 grams 4. Benefit to Cost Ratio: Not available 5. Feeding strategy: Feed seven days prepartum to seven days postpartum or until appetite responds; unpalatable. 6. Status: Recommended Protected Choline 1. Function: A methyl donor used to minimize fatty liver formation and to improve fat mobilization. 2. Level: 15g per day 3. Cost: 30 cents 4. Benefit to Cost Ratio: 2:1 (when protected) 5. Feeding strategy: Feed two weeks prepartum to eight weeks postpartrum to cows experiencing ketosis, weight loss, and high milk yield 6. Status: Recommended (rumen protected) Enzymes 1. Function: Increase fiber digestibility by reducing fiber (cellulase and xylanase enzymes) and DM intake. 2. Level: Not clearly defined (enzymatic units per unit of feed dry matter). 3. Cost: 15 to 25 cents per cow per day 4. Benefit to Cost Ratio: 2 to 3:1 (Canadian data) 5. Feeding strategy: Increase fiber digestibility, treated 12 hours before feeding, spray on product more effective when applied to dry diets, and may be diet specific. 6. Status: Experimental Magnesium Oxide 1. Function: Alkalinizer (raises rumen pH) and increases uptake of blood metabolites by the mammary gland raising fat test. 2. Level: 45 to 90 grams per day 3. Cost: 21 cents per pound 4. Benefit to Cost Ratio: Not available 5. Feeding strategy: With sodium-based buffers (ratio of 2 to 3 parts sodium bicarbonate to 1 part magnesium oxide). 6. Status: Recommended Methionine Hydryoxy Analog 1. Function: Minimize fatty liver formation, control ketosis, and improve milk fat test. 2. Level: 30g per cow per day 3. Cost: $1.60 per 454 grams 4. Benefit to Cost Ratio: 2:1 5. Feeding strategy: Feed to cows in early lactation receiving high levels of concentrate and limited dietary protein. 6. Status: Evaluative Monensin 1. Function: Improve feed efficiency for lactating cow, reduce ketosis and displaced abomasums in transition cows by shifting rumen fermentation and microbial selection. 2. Level: 11g to 22g per ton of total ration dry matter consumed (250 to 400 mg/cow /day) 3. Cost: 3 cents per cow per day 4. Benefit to Cost Ratio: 5:1 5. Feeding strategy: Feed to dry cows (reduce metabolic disorders) and lactating cow (feed efficiency) while monitoring milk components to evaluate optimal levels of monensin. 6. Status: Recommended Niacin (B3, Nicotinic Acid, and Nicotinamide) 1. Function: Coenzyme systems in biological reactions, improve energy balance in early lactation cows, control ketosis, and stimulate rumen protozoa. 2. Level: 6g per cow (preventive and prepartum) and 12g per cow (treatment and postpartum) unprotected, 2 to 3 grams protected. 3. Cost: 1 cent per gram (6 to 12 cents per cow per day) unprotected, 10 to 12 cents protected 4. Benefit to Cost Ratio: 6:1 (6 grams level) 5. Feeding strategy: High producing cows in negative energy balance, heavy dry cows, and ketotic-prone cows fed two weeks prepartum to peak dry matter intake (10 to 12 weeks postpartum). 6. Status: Evaluative Probiotics (Bacterial Direct-Fed Microbes) 1. Function: Produce metabolic compounds that destroy undesirable organisms, provide enzymes improving nutrient availability, or detoxify harmful metabolites. 2. Level: Not clearly defined 3. Cost: 5 to 15 cents per cow per day 4. Benefit to Cost Ratio: Not available 5. Feeding strategy: Feed to calves on liquid diet, transition cows, and during stress conditions. 6. Status: Evaluative for cows; recommended for milk-fed calves Propylene Glycol 1. Function: Source of blood glucose, stimulate an insulin response, and reducing fat mobilization. 2. Level: 225 to 454 grams per cow per day 3. Cost: $1.25 per 454 grams 4. Benefit to Cost Ratio: Not available 5. Feeding strategy: Drench cow starting at one week prepartum (preventative role) or after calving when signs of ketosis are observed (treatment role). Feeding is not as effective as drenching. 6. Status: Recommended Silage Bacterial Inoculants 1. Function: To stimulate silage fermentation, reduce dry matter loss, decrease ensiling temperature, increase feed digestibility, improve forage surface stability, and increase VFA (lactate) production. 2. Level: 100,000 colony forming units (CFU) per gram of wet silage. Recommended bacteria include Lactobacillus plantarium, Lactobacillus buchneri, Lactobacillus acidilacti, Pediococcus cereviseai, Pediococcus pentacoccus, and/or Streptococcus faecium. 3. Cost: 60 cents to $2 per treated ton of silage 4. Benefit to Cost Ratio: 3:1 (feed recovery) to 7:1 (milk improvement) 5. Feeding strategy: Apply to wet silage (over 60% moisture); corn silage, haylage, and high moisture corn; low natural bacteria counts (first and last legume/grass silage and frost damaged corn silage); and under poor fermentation situations. 6. Status: Recommended Sodium Bentonite 1. Function: A clay mineral used as a binder, shifts VFA patterns, slows rate of passage, and exchanges mineral ions. Field claims to tie up mycotoxins have been reported. 2. Level: 450 to 700g per day (rumen effect), 110 grams for mycotoxin effect 3. Cost: 15 cents per 454 grams 4. Benefit to Cost Ratio: Not available 5. Feeding strategy: With high grain diets, loose stool conditions, presence of mold, low fat test, and dirt eating. 6. Status: Evaluative Sodium Bicarbonate/Sodium Sesquicarbonate (Buffer) 1. Function: Increase dry matter intake and stabilize rumen pH. 2. Level: .75% of total ration dry matter intake 3. Cost: 6 cents per cow per day (bicarb = $0.19/454 grams; S Carb = $0.18/454 grams) 4. Benefit to Cost Ratio: 4:1 to 12:1 5. Feeding strategy: Feed 120 days postpartum with diets that are high in corn silage (over 50%), wet rations (over 55% moisture), lower fiber ration (<19% ADF), little hay (<2.2 kg), finely chopped forage, pelleted grain, slug feeding, and heat stress conditions. 6. Status: Recommended Yeast Culture and Yeast 1. Function: Stimulate fiber-digesting bacteria, stabilize rumen environment, and utilize lactic acid. 2. Level: 10 to 120 g depending on yeast culture concentration. 3. Cost: 4 to 6 cents per cow per day 4. Benefit to Cost Ratio: 4:1 5. Feeding strategy: Two weeks prepartum to 10 weeks postpartum and during off-feed conditions and stress. 6. Status: Recommended Yucca Extract 1. Function: Decrease urea nitrogen in plasma and milk by binding ammonia to the glycofraction extract of Yucca shidigera plant improving nitrogen efficiency in ruminant animals. 2. Level: 800 milligrams to 9 grams per day (depending on source) 3. Cost: 2 to 4 cents per cow per day ($1.28/454 grams for Micro Aid 1X) 4. Benefit to Cost Ratio: Not available 5. Feeding strategy: To cows with high BUN and MUN levels. 6. Status: Evaluative Zinc Methionine 1. Function: Improve immune response, harden hooves, and lower somatic cell counts. 2. Level: 9g per day (Zinpro 40 trademark product) 3. Cost: 2 to 3 cents per cow per day 4. Benefit to Cost Ratio: 14:1 5. Feeding strategy: To cows experiencing foot disorders, high somatic cell counts, and wet environment. 6. Status: Recommended

Literature Cited

Duffield, T.F., D. Sandals, K.E. Leslie, K Lissemore, B.W. McBride, J.H. Lumsden, P. Dick, and R. Bagg. . Efficacy of monensin for the prevention of subclinical ketosis in lactating cows. J. Dairy Sci. 81:

Erdman, R. A. . Choline nutrition in dairy cattle. In NFIA Nut. Inst. Proc. Kansas City, MO.

Grummer, R. R., L. E. Armentano, and M. S. Marcus. . Lactation response to short-term abomasal infusion of choline, inositol, and soy lecithin. J. Dairy Sci. 70:.

Hutjens, M. F. . Feed additives. Vet Clinics North Am.: Food Animal Practice. 7:2:525.

Krehbiel, C.R., S.R. Rust, G.Zhand, and S.E. Gilliand. . Bacterial direct-fed microbials in ruminant diets: Performance response and mode of action. J. Anim Sci (E.Suppl.2):E120-E132.

Kung, L. Jr. . Direct-fed microbials for dairy cows and enzymes for lactating dairy cows: New theories and applications.

National Research Council. . Nutrient Requirement of Dairy Cattle, 7th edition. National Academy Press. Washington, D.C. p. 192.

Overton, T.R, M.S Piepenbrink, and M.R. Waldron. . Interactions of liver metabolism and health in transition dairy cows. Cornell Nutrition Conf. Proc. Cornell Univ, p. 251.

Seymour, W.M. . Role of biotin in ruminant nutrition examined. Feedstuffs. 70:19:1.

Sharma, B. K., and R. A. Erdman. . In vitro degradation of choline from selected feedstuffs and choline supplements. J. Dairy Sci. 72:.

Symanowski, J.T., H.B. Green, J.R. Wagner, J.I.D. Wilkinson, J.S. Davis, M.R. Himstedt, M.S. Allen, E. Block, J.J. Brennen, H.H. Head, J.J. Kennelly, J.N.
Nielsen, J.E. Nocek, J.J. Vand Der List, and L.W. Whitlow. . Milk production and efficiency of cows fed monensin. J. Dairy Sci. 82 (suppl.1):75 (Abstr).

Weiss, W.P., and C. A. Zimmerly. . Effects of biotin on metabolism and milk yield of dairy cows. Cornell Nutrition Conf. Proc. Cornell University. p. 22.

Yoon, I.K. and M.D. Stern. . Influence of direct-fed microbials on rumenal microbial fermentation and performance of ruminants: A review. J. Animal Sci. 8:6:533.

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