To answer your last question. No, I would never ever take another hunters animal. The hunt itself is everything to me, and if I didn't earn the kill. You couldn't give it to me. Let alone me take it.
If I found that animal suffering, and knew it was yours that you were coming for. I might finish off the animal to stop it's suffering, and leave it for you. I know that wouldn't be legal, but i'd take that chance to stop the animal from suffering.