one of our chickens got bit in the back 2 summers ago by our dog it got infected and ate away at her skin tell there was a big hole where u could see her insides we ended up putting her down, but last year our frizzle got the same thing from our chickens pecking her, i was determined not to put her down like the other one so i seperated her for like 3 weeks in our garage. she healed great and she ended up going to our neigbers to join her flock