Sounds like a leg to me. My buddy shot one this year in the middle front leg. We left it be for about 30 minutes before trailing it and jumped it 60 yards away on some tall grass. Backed off for a couple hours and tracked her down about 200 yards later. Give her time and she'll stiffen up and track slowly, but be ready for a shot at anytime. When we found my buddies she was laying and when she tried to limp away I dispatched her. Of course, she was laying with a monster buck that I couldn't get a shot at! The Blood trail will be tough, but you should have some spots here in there. Good Luck!