I've heard people talk about how their guineas would beat up on their chickens, but I thought that was just a thing that happens from time to time. I was given two guinea chicks back in September that were raised with my chicks, and now they're almost as large as my chickens. Recently, they've started picking on a few certain individuals they mingle with. Now I have 4 roos limping and have caught them twice beating the snot out of one particular roo. They've even got a turkey and my sweet little cochin following suit now. I can't have them beating up my chickens, so I'm going to get rid of them. Is it typical for guineas to be so aggressive, or did I just end up with two meanies? They didn't even want me to handle them when they were babies.