So I have nine chooks and 6 of them have bare bottoms and it is a problem I have had with all of my chooks over the years. I just don't know what I am doing wrong. I have checked for lice and can't see any, but I would have thought that all of the chooks would be suffering if it was lice. They are fed on a good quality layers pellet, they have porridge in the morning made with water, and treats in the afternoon which includes corn on the cob, dried corn, lettuce, brown bread and meal worm. The bedding is a good quality chicken bedding and we use Smite to keep away the mites. We used to sprinkle this on the bedding but wondered whether that was causing the bare bottom, so we don't do that anymore, but nothing has change. One of our chooks pecks the others, but she also has a bare bottom so she is not the problem. Their run is about 10m x 15m so there is plenty of space with areas to have mud baths. The coups are poo picked every day and cleaned out each weekend, but not necessarily using a disinfectant. Does anyone have any thoughts please?