My only rooster has had an injury on its leg for about 3 or 4 weeks now, and even with treatment it seems to be getting worse. We are putting animal first aid green goo on it and wrapping it every so often replacing that wrap. But it doesn't seem to be getting better. This is what it looks like. Does someone know what the injury may be? Is it not a cut, but instead a disease or maybe some sort of snake or spider bite?? Any help would be thankful!