Ah, now your worries make sense. It was always the male guineas who led the anti-hawk harassment gatherings I witnessed so if you've only got one male left, I can understand that your flock would be a little leery of risking themselves. Interesting that you were having aggression problems when you had 15 guineas. My experience with them was that once the flock got bigger than about a dozen adults, ideally five or six pairs, that the flock would start to break up naturally...I had a couple of 'excess' pairs go feral and voluntarily leave, or perhaps they were driven out, I was never entirely sure. Never saw them again, but you'd hear them yelling sometimes way off in the distance for weeks as they made their way further and further away. I've read that guinea fowl are one of those species that are still straddling the line between being domesticated and being wild. I believe that. They are interesting birds!