The utilization of mill by-products as a feed for livestock is one of very broad interest scientifically and economically. It is of importance to the milling industry, the commercial feed industry, the livestock industry, and hence to any student of nutrition. Wheat bran, linseed meal, gluten feed, and many other feeds have made for themselves an important place on our livestock bill of fare. The value of oat feed, a by-product of oat cereal manufacture consisting of reground oat hulls, oat shorts, and oat middlings, however, is not so clearly established and well known. In co-operation with the Wisconsin Agricultural Experiment Station the Quaker Oats Company through its subsidiary, Monona Farms Company, is making an effort to determine systematically the best methods of utilizing oat feed in livestock rations and its value when thus variously used. The experiments are carried on at Monona Farm under the immediate supervision of two industrial fellows and the general direction of the Department of Animal Husbandry of the University of Wisconsin.