The Influence of Sex on the Rate of Growth of Chicks

The Influence of Egg Size on Subsequent Early Growth of the Chick

“…Carver and Hougan (1935) showed that in mass-mated White Leghorns, sex differences in the body weight are discernible at two weeks of age; while in Rhode Island Reds, according to Holmes et al (1932) these differences are marked at four weeks. Carver and Hougan (1935) showed that in mass-mated White Leghorns, sex differences in the body weight are discernible at two weeks of age; while in Rhode Island Reds, according to Holmes et al (1932) these differences are marked at four weeks.…”

Methods of Experimentation in Animal Nutrition

“…With poultry, evidence has only lately accumulated on the influence of sex on growth rate. In group feeding experiments with chicks it has been demonstrated that pullets have a slower growth rate than cockerels(i,2l, 27,29,36,47). It would appear that the strict quantitative relationship varies within the species, but within breeds it is sufficiently exact to correct for sex differences in chick group-feeding trials where inequalities in sex numbers exist between groups.…”