Whey solubles as a source of growth factors in chick rations. Poultry Sci

H AUGE and Carrick (1926) were the first to present evidence that a growth-promoting factor, later known as vitamin G, is required by poultry in addi-tion to vitamin Bj. Norris et al. (1930) and Bethke et al. (1931), using a milk vitamin concentrate as a source of vitamin G, confirmed the findings of Hauge and Carrick. Heiman (1935) found that one pound of dried whey was very nearly equivalent to 1.5 pounds of dried skim-milk. Other work on the vitamin B com-plex requirement of chicks has been re