My roosters love mating this much that my hens are afraid of them.the roosters favourite (Coco Chanel)has bald head and without feathers the roosters grip on her skin wich leaves hens seursly injured
My flock is quite small because I am only starting 4 backyard mix hens and 2 roosters my hens are young they started laying 6 months ago my chicken coop size ...um... medium (I'll get the size for u tomorrow)and my chickens free range on a field
4 hens an 2 roosters is WAY out of balance. If you want to keep the males house them separately. If you want to try and keep them all together add another 15 hens and all the accompanying costs for larger coop, run, feed bill etc. With your current 2:1 ratio your hens are never going to be happy. It sucks, but that's just the way it is.