Hi there -
We keep our guineas and chickens together with no problem (now), but starting out we had to work out some bugs and I will share that with you, because I think could be helpful to you.
Guineas need more space per bird than chickens or they go bonkers. Even for guineas. In my coop, I have a very high guinea sized window/door that I open during the day so the guineas can get out if and when they want to and the hens cannot or should not be let out for some reason. Personally, I like to keep the hens in the coop until about 1pm, it cuts down on the "secret nests", but the guineas need to be able to get out or they get aggressive towards the hens.
While this coop was being built, I had some hens & guineas in a portable thing but with the generous end of the recommended stocking rate for chickens, not guineas. There was no way to let out the guineas but not the hens and we were having some dog troubles at the time so they couldn't all be let out for a while - a few weeks. Our one male guinea literally went nuts and would attack the other rooster and one hen in particular, and also continually ram himself against the side of the portable pen. It was really sad. We couldn't get them separated for a while longer, we knew, so we ate him (!). He was really tasty, BTW.
We do eat our livestock, but if we didn't we would have put him in a dog kennel and craigslisted him free or cheap to a home where he could range, maybe advertising him as a tick vaccum.
The other remaining guinea fowl were not a problem at all as far as bullying or crazy-even-for-a-guinea behavior, even before the bigger coop was operational.
It does sound like there is too much testosterone in your coop at the moment. I would consider eating or selling the more aggressive males, and keeping at least one (relatively) docile male in case you want fertile eggs.
Are there any differences in lower breast patterning you can discern in the alpha male? Sometimes there is a slight difference - I have a daughter who can tell all my pearl guineas apart. She's always like, "no, that's not Polka-dot, it's Air-horn!"
It isn't as easy to catch them at night like it is for chickens, but holding a flashlight really close and walking slowly toward them (all people need to be out of/behind the light) and then quickly grabbing the body while holding the wings down is the easiest method for everyone. But of course, the classic barnyard chase with a fishing net will do the job, too. Especially if you need to catch the alpha male in the act & cannot distinguish him from the others.
Well, I hope this helps. Once we figured out how to keep peace & give everyone their space, the guineas have been so much fun to have around. And of course they help with those ticks.
Are you in east central MN by chance? My only male was taken by a fox recently, and I am looking for a male to keep for fertilized eggs.
