FEED ADDITIVES FOR RUMINANTS

摘要

A granulated feed additive composition for ruminants, comprises a core containing at least one biologically active substance and a coating covering the core. The coating contains (a) at least one protective substance selected from the group consisting of hardened vegetable fats and oils, hardened animal fats and oils, fatty acid esters and phospholipids, and (b) an enzyme capable of hydrolysing the protective substance and/or an activator of such an enzyme, and has an outermost surface layer containing substantially no enzyme or activator thereof. The feed additive composition of the invention is particularly stable in the rumen of the ruminants and can be effectively digested and absorbed through the postabomasum digestive organs.