I keep chickens as pets. If I was in a situation where I wanted to rescue roosters but couldn’t keep them due to crowing, I wouldn’t caponize. The reason for me is that I haven’t ever had experience with a capon. Dogs and cats don’t change that dramatically when they’re fixed, and they’re quality of life is the same, and often better. This is because they will have a lower chance for reproductive health issues and won’t attempt to wander around and possibly get injured, lost, or killed. They are usually fixed so they don’t have offspring, which would be bad for those puppies/kittens because it would contribute to the overpopulation of stray animals and it might be extremely hard to find them a good home. It just isn’t right to me to caponize a rooster (as a pet) because it might dramatically change him and wouldn’t really be for his own good- it would be so someone could keep a non-crowing rooster.
I’m not against people caponizing their roosters, but that is why I wouldn’t do it myself.
The only way I would caponize a rooster would be after I’ve seen a capon and interacted with him for an extended period of time, as well as observed him in a mixed flock compared to a rooster who hadn’t been caponized. If the capon acted the same as the intact rooster (minus crowing) then I personally wouldn’t have a problem with caponizing a rooster if I had to (as long as the vet who did it had a lot of experience and the surgery was low risk). But, only after I had observed the capon for myself to see that the quality of life was the same.
@lightspeed I think you should consider sticking to rescuing hens for now. Or, if you really want to rescue a roo, you might want to research house chickens.