I have a rooster who completely lost his voice, he shows me when I go into his coop. I have 7 roosters and he was the Body Guard to Prince, my clear leader of the second generation of chickens on my little farm. So Body Guard's problems started when he hurt his foot climbing on a wood pile, he ended up with a lame leg and fell out of favor, he couldn't go around with Prince anymore. He was getting terribly bullied by one other rooster who wanted to take his place with Prince, and I ended up brining him onto my enclosed porch and had a dog crate to put him in at night or when I wasn't around. You see I am a homeopath I treated his limp successfully, for he, like all my poultry respond well to remedies, but putting him back with the flock has not been easy, he continued to get beat up and after my TLC at home, he is less of a bully. So now it is bitter cold and I have him in a greenhouse with 3 hens who were his sisters, and they have chose to stay with him. Last Saturday, I was trying to get him to crow and he showed me he has no voice--nothing come out. I am trying to treat him again with homeopathy, so will keep you posted if I have success. If anyone else has a solution, please let me know. In homeopathy, you can lose your voice from fright, anger and abuse, grief, nervousness, etc. I have to be careful not to jump to foolish conclusions and start rotating remedies, but I have stated with anger and abuse as his cause, and thus gave him Staphysagria.