We had long ago a beloved rooster named Philip and you know the story about the ONE bad (mean) neighbour.... Smokey (Philips predecessor) used to go at night by himself into a shed and was not heard by the neighbours, Philip wasn't interested :-(. Off to the vet we went and he explained to me that cocks have a voice box which sits in the upper chest and he would TRY to glue it shut. It worked - partially :-(. After that Philip was a rooster "with asthma" because his face got all red when he made sorry sounding noises, poor baby. In the end he went to a friend's smallholding :-(.
I think finding a lovely home is more in every bodies interest than trying all sort of things :-(.