Growth and Blood Constituents of Immature New Hampshire Fowl Exposed to a Constant Temperature of 99°F. for 7 Days

The effect of high environmental temperatures on mortality, growth, feed consumption and thyroid weights of immature fowl fed ad libitum has been reported by Wilson and Plaister (1951) and Joiner and Huston (1957). In the studies presented here the effect on growth and blood serum sconstituents of 5-week old New Hampshire chicks maintained at a constant temperature of 99°F. for a 7-day period has been determined for both ad libitum and paired feeding regimens. METHODS The equipment used for these high temperature studies has been previously described (Squibb et al., 1954). The New Hampshire chicks used in these experiments were F1 female progeny from imported stock. The control birds were housed in all-wire cages in a room having a temperature of 70°F. The effects of an environmental temperature of 99°F. was studied under two feeding regimens: (1) ad libitum, and (2) paired. All birds were fed an imported mash containing …