Chick Size Research Articles

Hatching Weight of Chicks from Hens Fed Different Protein Levels

RESEARCHES on the protein requirements of growing chicks and the influence of the diet of the hen on egg size have been published by many workers but there is little information relative to the influence of diet on the size of chicks at hatching time.Byerly (1932) has presented evidence that the rate of growth of the chick embryo depends upon an inherent growth rate and suggests that it is probably identical for all breeds. He further suggests that this rate is modified during incubation in direct proportion to a function of egg size.Penquite and Thompson (1936) reported that embryos from high-protein-fed hens, between the seventh and seventeenth day of incubation, were heavier than the embryos from the low-protein-fed hens but a statistical analysis of the data for this period revealed that the differences were not significant.Titus, Byerly, and Ellis (1933), in a study of the various animal .

Studies in Coccidiosis in Chickens: Calcium Carbonate Additions and Coccidia

EXPERIENCE at the Wisconsin Experiment Station has shown that when chicks are hopper-fed chick size limestone grit or chick size oyster shell the consumption will vary from 1 to 4 percent of the ration. Chicks receiving an insufficient amount of vitamin D will consume more calcium carbonate grit than will those having access to direct sunshine or those receving an ample amount of vitamin D as supplied by cod liver oil or other vitamin D oils.Halpin (1926) reported that chicks reared inside, fed rations containing and addition of approximately 3.6 percent limestone, weighed 509 grams at ten weeks whereas those receiving no limestone averaged only 353 grams. Later experience, however, demonstrated that 2 percent of a calcium carbonate carrier in the usual chick ration was sufficient.Herrick, Ott, Halpin, and Holmes (1935) reported preliminary results which indicated that rations, high in calcium carbonate, increased the susceptibility of chickens to .

Egg Size in Relation to Growth of Narragansett Turkeys

A NUMBER of investigations have been made of the relationship between egg size, day-old weight, and rate of growth of chickens. Halbersleben and Mussehl (1922) found that day-old chick weight varied directly with egg weight but that after 35 days the chicks from the smaller eggs averaged approximately the same weight as the chicks that were hatched from larger eggs. Jull and Quinn (1925) found that the weight of the chick seems to be determined more or less by the weight of the egg from which it is hatched. Upp (1928) found a positive correlation of .8283 ± .0055 between egg weight and day-old chick weight. Rate of growth was found to be independent of the chick size at the time of hatching.Turkeys are grown primarily for flesh. The egg is merely a means of propagation and is little used as food, whereas, the chicken egg is of primary importance, .