From what I have read, caponizing is a procedure done on 3-6 week old chicks. It's a barbaric procedure, which is probably why you can't find a Vet that will do it.
But, read about it for your self.
https://modernfarmer.com/2014/04/ca...piece-agriculture-somewhat-disturbing-luxury/
They'll have a better chance of a good life, with someone who is wanting a rooster. It's true, there is a possibility they will eat the rooster. But, I don't think caponizing is a better option.
I have been in your situation, as well. The first time I was able to find good homes for two roosters. They were hand raised and trained by me, which helped me re-home them.
The second time I returned four roosters, to the farm where I got them. Another sexing error... The farmer said two were suitable for re-homing. But, sadly, 2 would probably be dinner. If you live in a rural area, you can also raise them together in a rooster pen.
I love roosters, but, this is the dilemma they present for us human beings...
God Bless!
