Spray the wounds with blu kote.
Also, if you are heating with a light, get a red heat bulb. That will calm them down.
I like brooder plates--give the chicks a place to hide.
I am using the paint on blue coat, no light. That are in a temp controlled room. I spent a good while today just watching them. They do not seem to be over preening although all of the damaged areas are within beaks reach. I've checked and checked for mites, but have not found any or any signs of them. I'm temped to bathe them all anyhow just in case. The 2 Isbars in there show no signs at all. Very frustrating!