If anyone is getting especially beaten up, probably separate that one to let it heal, so the other chickens will not pick at the spot. If there are just a few scabs, and they do not look like raised pox type lesions, just leave them alone, and they will heal just like a scratch on a person.
If you are now thinking about POX, search for photos so you can tell tell the difference.....
They are raised bumps with grey white around the outside and darker centers, also seen on the comb and wattles. And if you pick one off and put it in water, it won't dissolve and turn back into blood like a blood scab from a comb would.