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Some animals, like cattle and sheep, are what animal scientists call âruminants,â which means that they digest their food by fermenting it in a four-chambered stomach. Inside the stomach, there are bacteria that work to break down the tough stalks of the plants the ruminant animal has eaten.
Over time, there has been continuous selection by scientists of special strains of microorganisms, based on their efficiency to perform a desired function. Progress, however, has been slow, often difficult to explain, and hard to repeat.uminant animals (cattle, sheep, goats, and many other animal species) are nutritionally dependent on the activity of microorganisms present in the rumen. This dependence is based on microbial activity that degrades plant fiber, uses nonprotein nitrogen (NPN), and transforms phytotoxins or toxins produced by plants.