Yes, I agree, it is a scary thought, letting him free fly while out with other predators. A hungry hawk or vulture wouldn't think twice about snatching dinner when you are near by. I've seen it happen where I live. They'll even snatch a cat if hungry enough. We lost 2 very young cats that way. :(
CD, What more can I say that I haven't already said. You know how I feel, I'm so sorry..................You did your very best, and he died in the loving, comforting way that he deserved.