Hi, caring for neighbors chickens. I have raised chickens for years And have never seen this. Some hens have almost no feathers, bottoms, backs, legs, heads and even the rooster is developing a large red featherless area on his thigh. Roosters are aggressive, hens still laying, but this is far beyond a molt. I can send a picture if that will help. One hen is broody but I don’t want to bring her to my calm coop if they are contagious. Thank you for your help