I have 9 guineas and I think at least 3 are males. So far I have no problems with agression. They are about 3 months old. I've read on here that they are mighty tasty and was wondering if I should be culling a couple of the males. I really don't want them breeding my chickens (they haven't tried - yet) nor do I want them to fight each other. They are so cute. I loved it when they were little and would sleep flat on their tummies with their legs stuck out behind them.