How old is he? How old are the girls? What you describe is fairly typical behavior of an immature chicken around mature chickens. Trying to figure out if that is what is going on.
That is a decent sized coop for that number of birds. It sounds like there are problems when they wake up, but it quickly stops. You say it is not the guineas. How tall is that coop? My immature ones typically wind up on the roosts in the morning when the mature ones are on the coop floor. The young are avoiding the adults. Are your roosts high enough that he is safe up on the roosts?
It's hard to guess what is going in or how to fix it, there could be several different causes. The more you can tell us the more likely something is going to ring a bell. Photos might help. There will still be a lot of guessing.
That is a decent sized coop for that number of birds. It sounds like there are problems when they wake up, but it quickly stops. You say it is not the guineas. How tall is that coop? My immature ones typically wind up on the roosts in the morning when the mature ones are on the coop floor. The young are avoiding the adults. Are your roosts high enough that he is safe up on the roosts?
It's hard to guess what is going in or how to fix it, there could be several different causes. The more you can tell us the more likely something is going to ring a bell. Photos might help. There will still be a lot of guessing.