An improved ruminant feed containing rumen stabilized particulate proteinaceous feed material which is unstable in solutions having a pH value smaller than 4 and relatively stable in solutions having a pH value larger than 5, said feed composition including at least one non-proteinaceous nitrogen compound. The non-proteinaceous nitrogen compound is present in a weight ratio of 0.1 to 10.0 based upon the weight equivalents of nitrogen in the rumen stabilized albuminous component.
