Sorry it took ao long, thank you for taking an interest Let me answer your questions one at a time. They were penned, I didn't see any other wounds and they were not sick. I don't know if they were laying normally. I assume they were., they live on another property i get there once a day to care for them. And we have no roosters. I thought the same about one kept alone. He tried to mate the hens but they were having none of it. They weren't overly fond of him. He has mobility issues so he is not steady on his feet. When he'd try to mount them they'd squeak and run. Thought nothing of it. As I think back in what I saw I didn't see a problem just male guinea who's not gonna get any but the other day I saw him go aggressively after one of the girls and it clicked. He'd snap at them, why, I don't know but nevertheless... and generally miss but that made me think he's probably the feather puller. And to take that a step farther once there are no more feathers he catches skin. He does that enough and creates a hole or a giant wound. Mind you i never saw wounds but maybe they were never there to see. Once he got ahold of skin it ended quickly or not quickly... but shortly thereafter. I never saw any of this but it is my logical progression. What do you think? I have no pictures of the dead hens.