Abstract: A novel feed supplement for ruminants containing lipids which are dispersed within a protective protein-aldehyde complex is provided. The protective protein-aldehyde complex which is substantially insoluble in the rumen but soluble in the abomasum and lower gut of a ruminant, protects the dispersed lipids from breakdown within the rumen. The feed supplement is produced by a process wherein a protein and lipid mixture is contacted with a sufficient quantity of an aldehyde, while being subjected to higher than atmospheric pressure and elevated temperatures during an admixing and comminuting operation such as within an extruder, to form the protective protein-aldehyde complex. The material, when extruded in an agglomerated form, produces a feed supplement for ruminants.

Abstract: Processes for preparing nutrient compositions for animal feeds to obtain rapid and homogeneous impregnation of animal feed material with a nutrient material, such processes comprising preparing a dry mixture of from 35 to 48 parts of urea with 65 to 52 parts of urea phosphate, fusing the mixture at a temperature of from about 72.degree. to 90.degree.C, absorbing the mixture in an animal feed material, and cooling the product to provide a feed having a low moisture content and substantially free of germs, molds, and bacteria.