I am posting this again really hoping for even more feedback (I greatly appreciate those that have already responded!) and hoping to hear about other chickens that have had this type of injury and survived... We have a young Cockerl/Rooster. He is a frizzle so is pretty scraggly looking anyway. This morning I found him and our other bantam Rooster OUTSIDE of their coop yard, Chasing the fox out of our yard! I have no idea how they got out, we have had chickens in this yard for two years now and have some great photos of the foxes even sleeping on the roof of the hen house but could never get to them. We felt it was pretty secure, but apparently not for this years Roos. They scared off the fox which is a feat in itself but not without our little frizzle getting a large chunk bitten out of his back/rump. It's about a quarter to half dollar sized gaping hole. No skin left to try and have it stitched, but it doesn't look like the muscle got punctured at all. There is very little blood. We also had a bantam hen get her comb(??? not sure that's the right term on a hen) ripped off. I have washed both wounds and tried to apply a antiseptic balm to his wound (her's is fine I think and will heal nicely), but I am scared to put anything directly on the muscle that is showing through. Not sure what to do for him... Hate to cull him. Thank you for any advice. Update: He did fine through out the day and is eating and drinking and preening like normal. Talking a lot, he is angry and lonely. I put a small bantam hen with him but he actually started pecking at her, so... he's alone tonight on the porch with a heat lamp and private nest box. Lots of neosporin and the wound looks about the same so far. I guess we'll see how he does through the night... Thank you again for any advice.