It appears to be abuse. No, it's not normal. As
@Pyxis said, it may be rooster damage. The broken feathers attest to some rough action.
But the hens could be taking advantage of her, too. Broken feathers won't grow back until her next molt (unless she's currently molting), but yanked feathers will start sprouting pin feather. It appears those may be getting plucked out from the signs of blood.
This issue is one of the most complicated we deal with as chicken keepers. There are so many causes, it's sometimes very discouraging trying to find a solution. I suggest you park yourself in the run in the afternoon and observe. This should tell you who and how she's getting the abuse.
That's only the beginning, though. You'll need to then figure out what to do about it. Sometimes increasing the space helps. Changing feed to higher protein can help if the problem is dietary. Restricting the rooster's access can help the hen by giving her a break from his attentions. And finally, she may be a victim of bullying. There's a remedy for that, too.
First you need to watch your flock and figure out who's doing what to whom.
