We have had a backyard flock for one year. Last week one of our 5 Golden Comets died. I didn't think much of it at the time because she was always weak, often laid soft-shelled eggs, and we bought her as an adult so never knew how old she was. There were no obvious signs of illness. But since then we have noticed chickens with white blisters or wart-like growths on their faces. Today one of our 2 Marans died. She had been slowing down the last few days. Her face was so covered with the growths that her comb was completely white and her eyes were so swollen they were nearly shut. She molted over the last few weeks and her feathers were just starting to look pretty again when her face broke out. Our other Maran has also developed the growths and the other Golden Comets have started showing signs as well; white spots on their faces. I have not been able to find a match in the lists of poultry diseases I have read online and in books. If you know what this is or what to do please share! Can we save the other hens?