Ive had more elk come in on my predator calls that I have predators (to my knowlege)... 
I have even had them respond vocally to some of my coyote howls....
that's sooo funny i had the same thing happen was calling for about 1/2 hour or so decided to bag it and move on .Then all the sudden the mountains came alive, a heard of prob 45-50 elk between me and the truck but not one damn yote......
