Feed additives as defined as products used in animal nutrition for improving the quality of feed or the animals’ performance and health. They may be classified as technological, sensory, nutritional, or zootechnical additives.
Information regarding new products, dosage, time of application, or return on investment is critical to ensure that additives are included efficiently in the diets. The DKC’s team selects, evaluates, and summarizes the latest research published in scientific journals involving additives fed to dairy cattle.
Methionine is one of the most limiting amino acids in lactating dairy cow diets. Methionine hydroxy analogues as 2-hydroxy-4-(methylthio)butanoate are synthetic amino acids in which the amino group has been replaced with a hydroxyl group in order to protect methionine from ruminal degradation.
Methionine and lysine are the main limiting amino acids in lactating dairy cow diets. However, recent research shows histidine may be a limiting amino acid as well. A series of three studies (2015, 2016, 2017) conducted at The Pennsylvania State University’s Dairy Teaching and Research Center reported greater intake and milk protein yield in high-production cows fed low-protein diets supplemented with rumen-protected (RP) histidine.