I was at a hunting store talking to an employee about calls and stuff. He told me, what he does. And by no means am i supporting this, personally, i woudnt do it and think its to mean. But, he told me he traps a rabbit, and breaks its legs. Then he just goes to his spot and, puts the rabbit where he wants since it cant move, and the rabbit will scream and attract yotes. Personally, I woudnt do it.

edit: I just re-read your post and noticed my previous response wasnt really on topic. But what your saying, I think you have a good idea. They just might be a little cautious if the call is still going and they notice its dead. But other then that, I think that could work well. I think your on to something!