If I add more hens, will the harems even out?
A question for those that have a large number of hens and plenty of space. That includes you Polloloco86. How do you see your flocks behave? I generally see a small number of hens hang close to a rooster while the others form cliques and sort of wonder off to wherever they want to go. They don't get lost over the horizon but they don't stay close enough that he is really looking out for predators for them. I often use the term harem too but to me it is not a tight group totally under the rooster's immediate control.
Just curious. How are your 6-month-olds mixing in to the two harems?
I haven't interviewed the girls but it is my understanding from what I've seen and read that the girls decide which rooster they hang with. If they hang at all.
You can have barebacked hens whether you have a ratio of 1 rooster to 2 hens or 1 to 20. Or you can have none. Some factors are the male's technique, how much the girl resists and fights, how often they mate, difference in the weight of the rooster compared to the girl, and if the girls have brittle feathers.
I once had a cockerel and 8 pullets about the age of your oldest ones. Two of the pullets developed bare backs, bare enough to concern me. Since one of my goals in having chickens is to raise them to eat, I ate those two. None of the remaining 6 pullets developed bare backs so I did not see how I could blame the cockerel. None of the pullets I later hatched from those developed bare backs so I assume those genetics were not passed down.
And any advice on a different course of action and how to heal the hens would be great.
Are they actually injured to the point where they need to heal? Any cuts or scratches? Or are you just talking about the feathers growing back? If the entire feather is gone the replacement feather should start growing back fairly soon. But if even a speck of the shaft is left behind that feather will not grow back until they molt. With your pullets that could easily be next fall.
Some feather loss isn't all that unusual or bad. The risk is that they get a bare spot that can be cut by the rooster's claws. Once your cockerel's spurs grow long enough and sharp enough they might be a risk also. It usually looks a lot worse than it is but I can't say there is never any risk. There certainly can be.
So what are your options?
If none are getting hurt, let things continue as they are.
It sounds like you want fertile eggs so getting rid of both boys would not work. You can try getting rid of one of them. It might reduce the barebacked problem. It might not. Dad had a free ranging flock of one rooster and usually 25 to 30 hens. Practically all of those eggs were fertile but how successful you are with that can really vary. Some roosters may only keep a small handful of girls fertile. The bigger the rooster is and the older he is the more trouble they seem to have keeping a lot fertile, but Dad's was a full-sized dual purpose mixed breed rooster.
You can put "aprons" on the girls with the bare backs. You can do a search and find a pattern or a supplier for the aprons.
You can blunt the tips of the boys' claws. Wrap them in a blanket of big towel to help control them and using pet clippers or a Dremel with a grinding disc take off the sharp tips. Once the spurs grow in you can blunt them also. The claws and the spurs have a blood-filled quick so if you cut too deeply they can bleed so have some cornstarch or flour handy to throw on to stop the bleeding. Pretty soon you'll figure out how deeply you can cut without bleeding.
You could get rid of the girls with the bare backs. See if that solves your problems. I personally would not want to be breeding them anyway so I'm not breeding a bareback problem into my flock.
Good luck!