Bare backed hen doesn’t grow feathers

[Wyorp Rock]

Now I notice how the rooster harasses her, mating over and over again. She hides from him but is eating and drinking.

A long separation like that can cause some drama when putting them back.
The rooster harassing her and mating over and over is not that good though.
You have 9 hens right? How much space? Any other hens bare backed or just her?
The girls may need a break from the rooster. If he's continually harassing her, then pull him and leave her with the flock. It's easier to put a rooster back than a hen since he's really not part of the pecking order. The hens have an order, the rooster "revolves" around that.
Hiding a lot, she's under stress, so keep watch on her close. I would be inclined to direct dose her with poultry vitamins like Poultry Cell 1-2 times a week at a dose of 1cc per 3 pounds of weight for a couple of weeks to help her with reintegration.

What's your goal with the rooster? Are you breeding? You may find that your hens are more settled with the rooster separated out. If you are breeding/hatching, you can still do that. Select the hens you want fertile eggs from and put them with the rooster or put him with all the hens for a short period of time in the mornings.
I keep my roosters penned separately. In spring I just put him with the hens I choose for an hour or so, then take him out. I do this for 3-4 days in a row. Works for me, but everyone's situation is different.

 

[6BeachChicks]

Just popping in to say one of my hens had a bare back, and it grew back when she moulted, and the extra protein helps a lot!

 

[Heidi Lee]

It’s helpful to reframe the problem as the dang rooster, not the hen. I have seen him save the hens from hawk attacks but beyond that he is just a bully—I’m not trying to raise chicks. They are free range so hawks etc. are a threat. I will keep her in her saddle and away from him and await the molt.

 

[Goosey Girl]

It’s helpful to reframe the problem as the dang rooster, not the hen. I have seen him save the hens from hawk attacks but beyond that he is just a bully—I’m not trying to raise chicks. They are free range so hawks etc. are a threat. I will keep her in her saddle and away from him and await the molt.

A year later, what ever happened to your hen? I'm having an issue with a raw back hen like yours and just got a saddle for her.

 

[Heidi Lee]

A year later, what ever happened to your hen? I'm having an issue with a raw back hen like yours and just got a saddle for her.

She is much better. The saddle did the trick. Just remember to take it off once in a while so she can groom.

 

[KyCarolyn]

Ok, I will get her special protein and a good saddle. She does seem to be my rooster’s favorite, so this might be just what she needs. Many thanks for your help!

Once I put a saddle on one of my girls she regrew her feathers. It just took a while. Plus a saddle keeps the others from pecking as the feathers grow in.