Questions. Are you extremely stealthy approaching your stand/set location? As you approach is your scent blowing thru the area that you think the coyotes are? Are you "playing" the wind, clear view/shooting lane downwind? Remember to shoot before they are directly downwind. When you call, are you asking the coyotes to get out of their comfort zone? In other words, are you asking them to go places that they don't normally go? Are you asking them to go out into open fields at noon? I have killed more coyotes in fields 1-100 yards out than in the woods. BUT... not midday. At first and last light, and these are secluded fields that they normally travel. Do you sit as still as possible on stand, or do you mimic a bobble head doll as you look around?

How's your volume? Do you start very soft and slowly work it up a bit? Just a few questions.