Growth promotion in swine.

摘要

Methods and feed compositions for increasing the growth and feed utilization of swine employ frenolicin B or a physiologically acceptable salt or ester thereof as the active ingredient. Frenolicin B is used in sufficient amounts to achieve the desired results, for example, about 22 mg to about 66 mg of frenolicin B per kg of feed composition. The invention also embraces swine feed premix compositions intended for the preparation of said swine feed compositions, and a method of preparing the swine feed compositions by mixing the active ingredient directly or by way of the premix with conventional swine feed.