Frequently Asked Questions

Dairy Cow Nutrition (7)

  • What are acceptable or approved ingredients in dairy cow feed?

    The Association of American Feed Control Officials (AAFCO) releases an annual Official Publication that defines feed terms and offers the official names and definitions for feed ingredients. AAFCO members and non-members can order or download their Official Publication.

  • What is prohibited or banned from dairy cow feed?

    The Center for Veterinary Medicine (CVM) identifies contaminants and unacceptable feed ingredients that may pose a risk to humans or dairy cattle. Unacceptable ingredients include certain aflatoxins and strains of Salmonella. More information about dairy feed contaminants can be found on the FDA’s website.

  • Who regulates dairy cow feed?

    The United States Food and Drug Administration (FDA) is the primary federal regulatory agency responsible for ensuring the safety of animal feed. Within and associated with the FDA, there are several bodies to help ensure that dairy cow feed meets certain safety requirements in order to protect the safety of both humans and livestock.

    For one, the Center for Veterinary Medicine (CVM) within the FDA prohibits certain ingredients from feed. The CVM also directs the Animal Feed Safety System (AFSS). The AFSS performs regulations and guidance of dairy cow feed including:

    • Manufacture.
    • Labeling.
    • Storage.
    • Distribution.
    • Use.

    States also assist the regulatory work of the FDA by working with the Association of American Feed Control Officials (AAFCO) to create fair, uniform rules and model regulations.

  • How do I evaluate the bioavailability of rumen protected lysine products?

    The best method to evaluate absolute bioavailability of rumen protected lysine is to measure the rumen bypass rate and intestinal digestibility of the products using the same standard size and gravity weight. AjiPro®-L has been evaluated using this method. Additionally, evaluation methods such as the Dacron bag test and in-vitro test can be used to qualitatively compare the performances of rumen protected lysine products.

  • Do I need to use methionine when supplementing lysine to the diet?

    In order to maximize the effect of lysine and methionine, it is highly recommended to balance both methionine and lysine.

  • What is an optimal balance of methionine and lysine?

    The optimal ratio of lysine to methionine can vary by the biology model used. According to CNCPS 6.5 and NRC, the recommended lysine to methionine ratios are 2.7:1 and 3.0:1, respectively.

  • Why should I use AjiPro®-L to supplement lysine?

    Lysine is the first or second limiting amino acid for lactating dairy cows in the US, and numerous studies have demonstrated that increasing dietary lysine supply for lactating dairy cows improves their performance.

    Meeting the lysine requirement is particularly important when most feed ingredients used by dairy farms are deficient in lysine. Rumen protected lysine such as AjiPro®-L may overcome this deficiency as it contains a high concentration of lysine. For information on how AjiPro®-L can help improve your dairy cow’s lactating performance, please contact our sales representative for more information.

Feeding (3)

Price (2)

  • Is AjiPro®-L more expensive than blood meal?

    To compare expense, we evaluate the metabolizable lysine cost in cents over grams (¢/g). The metabolizable lysine cost of AjiPro®-L is generally 1.6 ¢/g, whereas the price and quality of blood meal vary over time, resulting in a metabolizable lysine cost range of 1.5-3.0 ¢/g. From this perspective, AjiPro®-L generally delivers lysine in a more affordable way compared to blood meal.

    Another advantage of AjiPro®-L is its ability to provide consistent, stable quality in the long term. Contrary to the variability in the quality of blood meal, AjiPro®-L delivers a consistent quality and amount of metabolizable lysine. This ensures a predictable, stable income over feed for dairy farmers.

  • What is the typical ROI of using AjiPro®-L?

    While it depends on the milk price as well as the lactating performance of dairy cows fed with AjiPro®-L, as long as lysine is the first limiting amino acid for dairy cows, the typical ROI is estimated to be 2:1 to 3:1.

Product (4)

  • Where is AjiPro®-L absorbed?

    The lysine in AjiPro®-L is mainly absorbed in the small intestine. In the small intestine, digestive enzymes such as lipase break down the protective agents that surround lysine in AjiPro®-L, releasing the lysine to be absorbed.

  • Can I pellet AjiPro®-L?

    No, AjiPro®-L cannot be pelletized. One of the protective agents of AjiPro®-L is hydrogenated soy oil, and this ingredient may degrade when exposed to high temperatures in the pelleting process. Pelleting AjiPro®-L may compromise the bypass rate of lysine in dairy cows, lowering the product performance.

  • Will AjiPro®-L hold up in Total Mixed Ration (TMR)?

    AjiPro®-L remains generally stable in TMR for up to 24 hours. This is an important feature of an effective rumen protected lysine product since it has to be mixed with TMR, and it may take 12-24 hours for dairy cows to finish consuming the feed.

  • How much lysine does AjiPro®-L supply to the dairy cow?

    AjiPro®-L can supply 25g metabolizable lysine per 100g fed to lactating dairy cows.

    The bypass rate of is 80% of total fed AjiPro®-L, and the intestinal digestibility is 80%. Since the lysine content of AjiPro®-L is 40%, the metabolizable lysine content is approximately 40% x 80% x 80% = 25%.