Some may never "go bad", or it could show at a year or so of age. No breed is really any worse than any other. The 1 best solution is to get rid of a nasty roo if you have no use for him and cannot handle the situation.

Teach them now who is boss, and make a point of scooping them up to carry around, pet and cuddle whenever you feel like it. Don't coax, don't chase, just walk up to them when they aren't expecting it and scoop them up. There is a great article on taming roos here:

http://shilala.homestead.com/roosters.html

I agree, life is too short to have a mean roo around. :)

Velvet ~:>

I have no idea how to keep roosters from being aggressive, but congratulations to you for having 15 grandchildren!!