I have found that they don't neccessarily peck at the wound. Just make sure you watch them for a while.
I had a chick that was scalped by a blue jay in with a chick that had a broken leg for 3 weeks. There was no picking at wounds going on. The two were best buds.
There are also products you can buy to stop the picking. I use Rooster Booster. It stings when you put it on though, so I don't like to use it unless I have to. It will also stain your clothing and your skin. I use a cotton swab to apply it.