I noticed yesterday blood running down one of my hens legs. Her name is Angel....then I found this on the back of her leg just above her knee.. Any ideas? She is still alive. I think it might have been a bot fly larva. Yesterday this wound was red and fleshy and today black and crusty. the blood has stopped. so I think the parasite has left. (?) I noticed strange behavior in her prior. She would seem to sleep too much. When to bed earlier than all the others and was not interested in being waddled and I am guessing not laying eggs. her comb lost its color and flopped over. She walks fine and today is as normal and happy. I checked all my other ladies and they have nothing wrong.