Depends on breed of the males and females, size of space they are contained in and individual temperaments. I have two flocks with multiple males with less than 10 hens in each group, but they have literally 20 acres of space to get away from each other when squabbles break out, as well as plenty of hiding spaces for hens and lower males. Not to mention I only keep ones that have good temperaments towards human and bird. I don't keep clumsy or aggressive breeders