Effect of a Vitamin BX2 Concentrate and Liver Meal on Growth and Feed Efficiency of Chicks Fed an All-Plant Protein Ration*

FOR some time it has been known that animal proteins contain a factor or factors essential for normal hatchability of eggs and for growth of simple-stom-ached animals. Parkhurst (1927) found that animal protein was necessary in the breeding rations of hens to obtain eggs of high hatchability. Numerous investiga-tors have confirmed Parkhurst's findings. Hammond (1942, 1944) reported that cow manure promoted chick growth. A nutrient common to dried cow manure, dried rumen contents, and sardine fish * Taken from a thesis submitted to the Graduat