Back before my voice deepened up I could make a pretty dang good coyote howl using just my voice I would drive and if we spotted a dog I would howl it would stop for a couple of second and my brother would shoot em. But then my voice deepened up and now I have to resort to to just whooping at them which seems to work pretty good. Or you practice your running shots. We got a lot of leading practice on rabbits and are pretty decent at hitting a coyote at a lope. A full blown sprint is a whole new ball game though. Have you thought about using your deer carcasses as bait? I dont know if it is legal up there but it works really well down here for giving you a little more time to get a shot off.