I once had a hen that literally had her skull exposed and skin was hanging down around her neck. The vet was closed and they don't take chickens anyway so I ran to the farm store and bought betadine and the drug store for some anbesol type tooth numbing stuff. I know it sounds really odd, but that's all I could think of to numb her while I stitched her up. Had to stitch all the way across the top of her head. She was about 7 years old then, and lived another 7.