Junglefowlboss
Chirping
I would just leave one roo with the hens(generally the top roo)and put the others in a separate pen. Sure the one rooster will chase the hens but thats normal. Add another roo after a certain period of time(month or two)and repeat this depending on the amount of roos you have. The one who was with the hens the longest will defend the hens from the other roos. Works for me