I’m on a couple of different guinea groups, here and Facebook. People keep their guineas all sorts of different ways, and sometimes it works great, right up until it doesn’t. Clearly you are in a “it’s not working” state right now. In this forum, most (but not all) posters agree that they see more peace in guinea flocks that are: 1) Brooded and housed separately from chickens and other poultry, 2) fed a high protein diet, 3) have at least as many females as male guineas, with maybe a few extra females. 4) have a larger flock of at least a dozen or so. It sounds like co-housing, low protein feed, and small flock size
(?) could be part of your problem, or part of what started your current disruption.
If it’s early spring in your area, then your guineas are just gearing up for breeding season, and their hormones are going haywire. It sounds like the younger guinea cocks might be more dominant and aggressive than your older cocks, so they’ve decided to challenge them and take over the flock. Cock challenges can be dramatic, but they don’t currently result in bloodshed (knock on wood!) in my flock. It likely doesn’t matter so much what color your newer birds are, but the genetic background of your younger birds will be different from your older ones. It’s likely they were bred from more dominant and aggressive birds.
I was in a similar situation where my guineas weren’t working out with the rest of my poultry, probably because I brooded them together. I ended up rehoming almost all of the males. Given their violent history, I’d be afraid that your cannabalistic younger birds have now learned some truly awful behaviors. I don’t know how attached to them you are, but I’d think about butchering your aggressive newer males and staring over with new keets raised and housed separately from your other poultry. High protein feed and separation from your chickens could help prevent problems next year. I hope you’ll keep updating us as to what’s happening in your flock!
