I let my chickens out this morning and found one with blood and dried blood all over its head that appears to be coming from a tear/cut at the base of the comb. I am guessing this happened in the overnight but it was dark when I locked them up and I did a quick count but didn't notice anything. They are in a pretty secure run and not free ranging so I don't think this was a predator. I brought the chicken inside and tried to rinse and clean off the blood but it was really dried and stuck down. I applied neosporin to the wound and now have her separated in a crate. My question is what is the best course of action to treat and return. I have 5 chickens that have all been together since chicks. Should I just continue to clean and treat with neosporin? Anything else recommended? How long should I separate and when and what is the best method to return? I'm guessing they are getting after each other because we are in upstate NY and have had cold temps and snow and they are confined more. They have plenty of space in the run during the day but I think the cold temps limited them yesterday. Thanks!