The Stability of Vitamins A and D in Mixed Feed Ingredients

Free Fatty Acids and Rancidity in Relation to Animal By-Product Protein Concentrates

“…They claimed that there was significantly greater destruction in a basal ration containing meatscraps and dried skimmilk than in a comparable ration containing casein in place of the above ingredients. Baird, Ringrose, and MacMillan (1939) found progressive but not complete destruction of vitamin A from fortified cod liver oil when mixed in a chick ration and stored in burlap bags at summer temperatures for 25 weeks. Holder and Ford (1939) in a study of the stability of vitamin A from cod liver oil in mixed feeds report "Some grades of meat or fish scrap used in poultry feeds may promote vitamin A destruction although there was no evidence of any loss from the meatscraps used in this investigation.…”