The growth rate of different cocks grew fast. At 4, 6, and 8 weeks of age, the cock weight was 13%, 20%, and 27% higher than that of the hens, respectively. If the male and female polyculture, the weight is not the same size, food trough, drinking fountains require different levels, often overlooked.
The genetic performance of different hens after 7 weeks of age, the relative decline in growth rate, a sharp increase in consumption of 1 kg per kg, so the hens are sold around 7 weeks of age, feed utilization rate is high; the growth rate of the cock after 9 weeks of age Declined, so the best selling efficiency of the 9-year-old cock.
The environment requires different rooster feathers to grow slowly, and hen feathers grow faster. Therefore, the temperature requirements of the roosters are higher than that of the hens in the early period, and lower than that of the hens in the later period; the rooster has a larger body weight than the hens and therefore the breast cysts The incidence rate is higher than that of the hen and requires that the litter is loose and properly thickened.
For nutrition, different roosters have poorer ability to deposit fat than hens, but roosters use proteins more efficiently than hens. From the age of 2 weeks, the protein level of the cock feed should be higher than that of the hens.
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