Rescued Chicken- how to stimulate feather growth?

[Rikkipedia]

One of my friends has her chickens and ducks together and this would be fine, except the ducks tried to mount the little frizzle hen and ended up pulling all her back feathers out.

I have taken the hen to my house (where there are no ducks) but it's pretty chilly out so she's currently in the house and I put her outside with the other chickens when I have time to stay outside for a little.

Is there a good way to stimulate feather growth? I would like to put her back outside as soon as I can.

 

[Smoochie]

She could probably use more protein.. You can get some higher protein feed or give her some high quality cat food.

 

[earlybird10842]

Bumping this post. Sorry I can't do more.