Abstract

During recent years it has become a common practice to supplement poultry rations with cod liver oil as a source of fat-soluble vitamins. The addition of cod liver oil to poultry rations involves either mixing the oil into the rations on a small scale at the poultry plant or the addition of cod liver oil at the time the mashes are manufactured at commercial feed mills. In the latter case there is an interval of weeks or months between the addition of the cod liver oil to the feed and its consumption at more or less distant poultry plants. Hence, a question has arisen as to the permanency of the cod liver oil vitamins in stored grains. Inasmuch as hundreds of thousands of gallons of cod liver oil are used yearly for poultry feeding purposes, this question assumes considerable practical importance. Accordingly, it was decided to conduct an investigation to .

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