Hello, I am new to the group and look forward to participating. I am also new to raising chickens, but, I am learning fast! I have a problem. I have 3 Australorp hens, that have been raised together since hatching. It is almost time for them to begin laying. This morning I noticed that two of them have head injuries. One has a raw wound, and her comb is half way detached and flapping around. The other ones injury is less severe as the comb is still be attached, but a wound seems to be beginning in that area. Why would they begin picking on each other at this late date, and what do I do about i?