Bullied hen

[XAshleyX]

Hi everyone. Today when I went outside to spend time with my girls I noticed one of them had a bloody comb and head. I sprayed vetericyn on her comb and back of head and then applied hen healer. I'm just so puzzled as to what could've happened because I noticed another one of my girls (Brownie) has dried up blood on her. It's definitely not brownie who hurt Fudge because they were around each other often today. Fudge ran away anytime Luna got near her and I caught luna twice grabbing onto Fudges head and not letting go. Is keeping Luna in a crate for a day or two or longer a solution to help stop this bullying behavior? Also It's currently 35°, I'm afraid the hen healer will freeze overnight. Should I bring Fudge inside for the night?
Thank you!!

 

[Eggcessive]

How much room do they have in the coop and run? Do they free range? What breed is Luna? Have they been together all along? You can try to separate Luna for a couple of days. It may help, may not. Spending time with them to figure out why one is picking on the others may help. When nothing else helps, pinless peepers is a device that might help keep a bully from pecking another. I usually don’t don’t see frostbite unless temps get below 15F. You can use your judgement about bringing her (Fudge) in.

 

[XAshleyX]

How much room do they have in the coop and run? Do they free range? What breed is Luna? Have they been together all along? You can try to separate Luna for a couple of days. It may help, may not. Spending time with them to figure out why one is picking on the others may help. When nothing else helps, pinless peepers is a device that might help keep a bully from pecking another. I usually don’t don’t see frostbite unless temps get below 15F. You can use your judgement about bringing her (Fudge) in.

I forgot how many actual sq it is but it's more than enough! I had it built this late summer/fall by a contractor and I spent endless hours on BYC looking into sq for ventilation per bird in coop, sq in run, coop, and nesting boxes. I don't remember his exact measurements but I actually a picture of their run. They are not currently free ranging because it's dark by the time I get home from work, but in summer they do free range. Luna and fudge are Black Australorps. I got them from a local farmer this in early July. Yes, they have been together all along. The picture cuts out but what you can't see in the picture is their coop which is a shed that was made into a chicken coop

 

[Eggcessive]

Chickens do get bored, and when they do, they may pick on others. Having things to explore and climb on in the coop and run may help. Most enjoy getting outside to free range. The common causes of pecking or cannibalism are overcrowding, boredom, receiving less than 16-20% protein in the feed, especially if treats dilute the protein in their feed, and too much light inside coops and nests.