I'm sorry to hear
I had a 2 yr old hen that I raised that did the same thing I worked with her hoping she would get well I even took her to the vet and she was treated for Mereks disease..The Vet told me to keep her separate from the others so I did but she died anyways so it may be Mereks disease pls look up the symtoms or watch YouTube video's to see if urs has the same symtoms.God Bless
