Hi! I'm late to reply, but in the event anyone else is on here looking for solutions...When we used to live in town, a few weeks or months after our then dog died, raccoons started plaguing our coop. Every night they came. It was like a horror show. My husband who had to leave for work at 4am resented being deprived of his precious sleep, and so went out one night with a baseball bat. There was a family of raccoons and we had no light. My husband had cornered them behind a shed and they were screaming. I brought him a gun. He waved it off growling "too noisy". Then, a raccoon made a mad dash and my husband became Babe Ruth swinging for the bleachers. We never had anymore trouble with raccoons (nor the crack head neighbors lol). In the mean time however, one of the little bastards had ripped the skin off the neck of one of our Americaunas. She was a beautiful young hen and it just broke my heart. I was sure she was a gonner. I sparyed blue kote on her raw flesh and hoped for the best. That was almost a decade ago? We still have her. She doesn't lay anymore, obviously, but she is still going strong. Blue Kote works great. Disinfects and the color discourages pecking. Her name now is "Neckless" as she lacks feathers from her upper breast to her chin.
A vet once told me that he finds that if you can quickly treat an animal and return it to it's regular routine it has the highest chance of survival. Being separated or out of routine causes stress which compounds problems. So treat em and get them back in with their coop-mates.