Bare, bright red patches

[roosterof4]

I have 2 Black Australorps with these bright red patches where the feathers have come out around their comb. The other chickens peck at them and I had to separate them from the flock. Does anyone have any idea what this could be and what to do to fix it?

 

[sourland]

It may be the result of rooster damage or the other hens feather pecking. If the skin has not been too severely damaged they should regrow 'head' feathers when they molt.

 

[roosterof4]

We don't have a rooster, just 11 hens. If it is from pecking, is there a way to stop it?