I'm a die hard bow hunter and I have not recovered 2 deer I've shot. It sucks bad I still think of it all the time. Those two deer I have no doubt lived. I fallowed the blood trail till it went from q tip drops then just ran out and I looked for 2 days. I think no ,matter what weapon you use you owe it to the animal to practice practice practice and when your lucky enough to get a shot do everything in your power to recover the animal.
A bow doesn't wound animals... a bad bow hunter does and I was a bad shot twice but I caused me to get that much better but it happens spear, bow, and guns it happens. Would you stop fishing if you gill hooked a bass? I say just do the best you can because you owe it to the animal. Shame he went out like that but at lest you found him Mr ctom