Soup bones left over from butchering also - we cook them up and toss them in for the chickens to work on.
You can put Vicks by the sore spot too. The other chickens don't like it, and they leave them alone for a few days, according to my mother. We tried this - but my husband got plain petroleum jelly instead, and used that - it still worked, I guess they didn't like the smell of that either. Funny!
Make sure your hens really are hens, if they are young. Roosters tend to peck more than hens do, and they'll absolutely flay a young rooster that is coming into maturity.
We learned this one the hard way. We were sold some chickens, and told that "this one with the small comb is an immature hen, and that one is an immature rooster - see the curving tail feathers on that one?" We grouped them accordingly - one rooster and two hens per cage. The "immature hen" ended up badly pecked, a big bloody patch all down the neck. We separated the poor chicken out, and it landed in a cage by itself. Later, two others ended up pecked (again, by a rooster - but not nearly so badly as the first one), so we put them in with the first one - interestingly, the one with the long tail feathers was one that ended up there - fine, we thought, we still had two hens and a rooster.
Well, the one with the curvy tail feathers was a SHE (laid an egg), and the one identified as a juvenile hen (short comb, short tail feathers) began to crow one morning. We DO still have two hens and a rooster in that cage, but they aren't exactly the ones we thought they were.
The long and rambly point to this is that it is often the roosters that do the "hen pecking", and that they'll beat up a juvenile rooster more than they'll beat up a hen.
Once blood starts, you really have to do something though. Vicks might be an easy fix - but I'd not put it on the wound, just near it. It has menthol in it, and that can really burn on an open wound.
