I have 4 girls, all about 1 year old. They get on well and dont peck each other. I have checked them all and can see no sign of mites, but today I put some powder on them just in case. The warren is the worst looking, so I have put pics on of her. 3 of the girls are developing bald patches on tail and under vent on bottom, and also on the lower neck / Chest area. Some of the feathers look like they have been nibbled down to the quil, but after reading on here I now think that could be new feathers coming through. The warren seems to have lost weight too. Anyone got any ideas please? PS. they are all still laying, eating, drinking and seem quite happy in themselves. Thanks in advance.