Tried adding our younger buff Orpington to the 2 hybrids, pecking ensued and I separated the buff out again. Checking her today after a couple of days she has a severe wound to the back of the head. She's clucking about fine, it doesn't smell or look too gross around the edges, but oh my, its a hole. My first thought was this going to be terminal and I was planning to euthanise. Is that a rash move or is this survivable?