I've had some really nasty roosters. And some really nice roosters. My jersey giant rooster took almost a year to get really aggressive. Just the hormones kicking in I guess......he was mostly fine before that. Couple nips here and there that I dealt with immediately. At 3-4 months, they are too young to tell for sure.
I do not keep aggressive roosters around. Except I have one snotty little bantam cochin (mottled)....he will bite your ankles or your hands if you don't grab him quick enough. He is hilarious though. He spends more time bothering the girls and other roosters than people and isn't really a problem. He is so feathered he can barely shuffle around, so is not much of a threat. Standard roosters are big enough to do damage, so they have to be nice or get the boot. I don't cuddle them or anything...I ignore them. As long as they stay out of my business, i stay out of theirs. It seems to work well. If they dance at me or drop a wing or anything, they get booted out of the way. My current batch is no problem at all.....2 big roosters, 3 bantam cochin boys and a bunch of teenagers.
I do not keep aggressive roosters around. Except I have one snotty little bantam cochin (mottled)....he will bite your ankles or your hands if you don't grab him quick enough. He is hilarious though. He spends more time bothering the girls and other roosters than people and isn't really a problem. He is so feathered he can barely shuffle around, so is not much of a threat. Standard roosters are big enough to do damage, so they have to be nice or get the boot. I don't cuddle them or anything...I ignore them. As long as they stay out of my business, i stay out of theirs. It seems to work well. If they dance at me or drop a wing or anything, they get booted out of the way. My current batch is no problem at all.....2 big roosters, 3 bantam cochin boys and a bunch of teenagers.