How old are/were these roosters? Ours are showing signs of aggression now that they're 17-18 weeks. Crowing isn't non-stop, but more frequent. They sometimes attack the hens, I don't see the reason. They've tried asserting themselves on me, but that quickly stops. I'm the head (----) around here, and so are all the people who live here. I've heard for the best meat to process them up to 26 weeks, do y'all agree? After that it gets tough?
I don't mind the crowing so much, I find it way less stressful than a barking dog. The constant dog barking irritates me so much because it shows poor human ownership whereas the bird brains crow instinctually.
Our little crow continues to crow throughout the day, which in turn sparks the second crow going. The big crow on the other hand crows morning and when I go in and collect eggs.
The little one is pushing it on the noise pollution. However like you, I will take it over a continual barking dog.
The age for butchering depends on the breed of chicken. Duel purpose birds are around 16 weeks onwards. The older they get the tougher the meat. He would be at a good age.
I will let experienced chicken cleaners to pipe in on that.