I have a friend who is new to "backyard" chickens and they have begun dying. She took one to a vet who did an autopsy and said it died from a virus called myelocytoma. I did google it, but am wondering if anyone knows anything about this virus or has had experience with it? Ive had chickens for 15 years and never heard of it. Feel bad for her, as the vet said she might lose them all (started with six) - it cant be treated.