What are the precautions for the feeding and management of egg-type breeding chickens?

In order to obtain a high fertilization rate, before the roosters are placed into the hen flock, roosters that show no secondary sexual characteristics, are too heavy or too light in body weight, have disabilities of the eyes or legs, or are listless should be culled; for breeding roosters used for small-group mating or cage housing, semen quality testing should be carried out where conditions permit; a rooster mates about 20 to 30 times per day, with mating being most frequent in the early morning. For breeding chicken flocks under semi-confined housing, the chickens should be released onto the exercise yard as early as possible during hot seasons. Under large-group housing conditions, the fertilization rate sometimes fails to reach the expected level, which is related to the flock being too large. It is advisable to divide the flock into small pens of no more than 2000 birds each, so that the roosters can be distributed relatively evenly within the flock.