Sorry to hear it man.......truly. Sounds like you did it right, actually. If the hit was a tad high, and the exit a tad high, all the blood could have stayed in her chest cavity, and not escaped. Hitting an artery is what causes the "spray" that is so easily visible when tracking..... I'm not sure what else you could have done......

And yeah, I guess the meat was probably bad after that long......I will say, though......It's a very POSITIVE thing that you found her. What's even more sickening is when you don't....