I need some advise. I have three Bourbon Red's and one Spanish Black. They mix with my laying chicken hens in the coops and free range at their discretion. The Bourbons were bought about a month ago and they had forty plus chickens at that farm also. They were around each other there but not in the same pen. One of the Bourbon hens started loosing feathers slowly and I assumed it was from mating. Today I noticed they are falling out very rapidly. Also today, my Tom started loosing his tail feathers. Went from a full fan, to four! The hen that is loosing the feathers has been roosting consistently with the chickens. I've noticed some brown diarrhea from that hen. I also assume it's too late/early for a moult to start. The temp has been in the single digits here in Colorado. Any ideas/suggestions will be appreciated!