Can you examine the leg? If the injury doesn’t resolve itself in a few days, is a vet an option? I think you are doing the right thing separating him and letting him heal. As for his flock, does he have other Guinea fowl or do you have only chickens? Lastly, I do give layer feed for a few months every year to all poultry, male and female. IMO, it’s sustained layer feed that is dangerous to the kidneys. It’s possible I’ll have roosters and cocks with kidney disease down the road, but so far so good.
