| abstract |
An improved feed additive for administration to ruminant animals having digestive upsets, resulting from imbalances of their rumen microbial population, which occur for various reasons, for example when the ruminants are shifted from a ration which is high in cellulose content to a ration which is high in starch content. The ruminant feed additive comprises rumen microorganisms adapted and cultured in vitro on a medium which is high in starch content. The method of the invention provides an in vitro adaptation and fermentation system for the production of selected rumen microorganisms. |