I have a hen who broke her leg two weeks ago. I made her up a splint and separated her for a week, then let her back in with the others when she could walk. Yesterday I Took her splint off, and while fluffing her thigh feathers, I saw a flash of green. I looked further and it was This green/this green. it covers the space of a half dollar coin. could this be gangrene? or some other kind of infection? I am willing to answer any questions, thanks!