The Effect of Hen Diet and Chick Diet on the Need of Chicks for an Unidentified Growth Factor

Abstract

IT HAS been demonstrated by numerous investigators that a number of products of marine origin exert a beneficial effect on the growth of chicks, when added to certain practical rations. Christiansen, Deobald, Halpin and Hart (1940), Carver and Evans (1943), Hammond and Titus (1944), in investigations of diets containing a high level of soybean oil meal found that the addition of fish meal to such a diet resulted in more rapid growth of chicks. Cravens, McGibbon and Halpin (1945) noted a similar growth promoting effect when fish press water and ground fish viscera were added to a chick ration composed of yellow corn, wheat by-products, meat scrap, soybean oil meal, minerals, fish oil and riboflavin. Berry, Carrick, Roberts and Hauge (1945) demonstrated that fish press water, fish liver meal and animal liver meal were satisfactory supplements to a chick diet containing all vegetable protein. They found further that the water .