Use the 17, period. With a silencer, I wouldn't worry about it at all. Granted, the scent of dead coyote laying in your shooting lane might screw things up.
Animals do weird shit. We've all had deer run off because a mouse farted in china, and we've all had them hang around shooting ranges. I've stalked a 8pt from 15 yards away for about 200yds, he wouldn't let me get a shot, then decided to spook because of a car a couple hundred yards away. I've been out blasting squirrel with a shotgun, running the dog, and walked up on deer at <20yds. I've had deer run TO me, walking through the woods, and get scared shitless once they realized I'm a human from literally 4ft away.
Had a doe last year watch my arrow fall off the nock as I drew. She stuck around while I eased down and re-nocked, drew again. I passed on her, too small, but wanted to mess around.
ETA: can you use silencers with your CF for deer? Have brother go buy a deer tag. Maybe you'll get a two-fer.