United States Department of Agriculture Agricultural Research Service
   

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Image Number K11047-14

In studies of grazing efficiency and animal productivity on different pasture mixtures, animal scientist Kathy Soder observes the grazing behavior of a Holstein cow with a fistula on its side. The fistula allows scientists to sample partially digested samples from the animal's rumen.

Photo by Stephen Ausmus.



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Last Modified: 11/26/2009