I need help. My chickens are all beginning to look like baboons. They are losing feathers around the bottom and tail. Some have feather loss on the back but I think that's due to the two roosters. (2 roosters, approx. 100 hens). A couple are seeming to loss feathers all over. The hens are in two coops. The coops are opened daily and they have a huge run in the pasture with the ducks and guineas. The ducks and guineas are fine. We usually don't experience molt until August. We have dipped them in Orange Guard solution a month ago in case of external parasites. I have also dusted everything, including them, with DE mixed with pyrethrin powder. I also mix some DE in with their feed. I've read I could use Ivermetcrin (sp?) for worms/ mites but can't find a good way to administer on line. BTW - I do sell all eggs and would rather not take them out of production with feed costs as high as they are. Any help? Should I post pics?