I have 13 chickens and a few days ago a dog got into the coop and tore 2 of my hens up. Me and my sister performed emergency surgery and we had to sew them up. The patches we had to sew were all the way down to the muscle. It has been a few days now and they seem to be acting fine. The areas we sewed them up have scabbed on the edges. But I am worried that Pepper may have gangrene. There are some green patches around the injury that lead me to that idea. Sunflower is my favorite hen and she is the other one to get hurt. She looks better than Pepper but she isnt acting normally. She is usually a loud talkative hen but she is very quiet and reserved now. One other thing I forgot to mention is that Pepper smells really really bad. But they have been walking around and eating and drinking fine. I really would like some advice.