The Comparative Vitamin D Requirements of Growing Chicks, Turkeys, and Pheasants

Growth and Calcification of Bronze Turkey Poults from Hens Fed Different Levels of Vitamin D

“…Most experiment stations, and commercial feed manufacturers recommend that turkey breeders be given twice the amount of vitamin D furnished to chicken breeding stock. Unpublished work at this station, as well as the results of Baird and Greene (1935) and Jukes (1939), are in general agreement that the vitamin D requirements of growing turkeys are considerably higher than the requirements of growing chicks. PROCEDURE Four lots of Broad Breasted Bronze turkey breeding hens received 0, 100, 200, and 400 A.O.A.C.…”

The Influence of the Partial Replacing of Inorganic Salts of Calcium, Zinc, Iron, and Copper with Amino Acid Complexes on Bone Development in Male Pheasants from Aviary Breeding

“…The problem of proper nutrition for captive-reared game birds is a major one and leg deformities in birds might result in a high rate of mortality after introduction to natural environment, where bones are exposed to extensive bending and torsion loads, tension, or compression [40,41,42]. The skeleton in wild birds needs to be lightweight to minimize the metabolic cost of flight, and strong enough to withstand the forces encountered during movement [8].…”

“…In birds, bone ash is a very important sensitive indicator of availability of minerals [46]. Furthermore, a bone ash percentage and the internal structure of tibiae are signs of rickets in pheasants which are very sensitive for changes in the diet [40].…”