I'll call once. If I get a responce, I shut up, til he's on the ground. The exception is, if I hear hens start yacking, I'll call back to them. My goal is to get them PO'ed about the "wench" calling to their tom. I try to get them so mad, that the first thing they want to do when they come off the roost, is come over and kick my @$$. Nothing gets a tom more excited than two hens talking dirty to one another. He's usually right behind them.