Why should meat-type breeding chickens be raised separately by sex during the growing period?

If males and females are raised together, the roosters will quickly become overweight and develop toe tumors and leg problems. By the breeding period, the fertilization rate will decline, and many roosters will have to be culled, causing an imbalance in the male-to-female ratio and seriously affecting the fertilization rate of hatching eggs. Raising males and females separately has three major advantages: First, it can effectively control the weight of roosters and maintain good reproductive condition. Second, it reduces the occurrence of toe tumors in breeding roosters. Third, it can increase the fertilization rate of hatching eggs by 2% to 3% and the hatchability rate by 2% to 6%.