The only time I had any problems with my birds is when they out grew the brooder box. They were pulling feathers out of each other.Found the answer to that problem here on BYC more room. This ended as soon as they went into the coop and run. I also let them free range as much as possible they are great foragers and hardly eat crumbles dump more on the coop floor than they consume. This is my first time at the rodeo. Thats why I came to BYC