I went out this morning to let the Nuggets (Cornish X) out of the tractor to free-range today, and the last chicken out of the tractor was limping. He wasn't putting any weight on his left foot, and once he was out he sat himself down and started eating grass while seated. On closer examination his foot looks swollen, and green. I suspect he got his foot stuck in the tractor while it was being moved at some point. The leg doesn't seem to bother him much as long as he's not trying to walk on it - he's alert and still plenty interested in food. For the moment I have him sequestered in a box with food and aspirin-laced water, but he's definitely destined for the big coop in the sky quite soon. My question is, does anyone know what that green color is? I know it's not grass staining (someone gave me a tip that rubbing alcohol on a swab rubbed o nthe foot would turn green if it was grass stains). I'm worried that it might be gangrene (I tried doing a search for gangrene, but the images were very disturbing!) or something else nasty enough to render the meat inedible. I'm just trying to determine if I should be processing or disposing of him once we put him out of his misery?