Why not use something that'll grenade the hell out of them? Pelts are fetching nothing these days.
in that case... 22.250? 55 grain Speer TNT... that should give ya some red mist out there...
would another coyote eat a blown up dead coyote? hell they eat cow manure.. so why not...
Dam near nothing eats coyotes in my experience, 'cept possums. True story - I keep a bait pile on my neighbors field where I can sit in my shed and snipe them at night. The last one I shot this year was a spinner that took off east while I was trying to line up it's mate for the double. I waited till the next morning to go look for #1 and couldn't find her. 2 weeks to the day I found her laying in the wide open. She'd made a 90 degree turn after she crested the hill and went about 200 yards just out of sight. The point is the buzzards, crows,ravens, and eagles were hitting my pile for those 2 weeks and that dead yote was laying in the same field. NOTHING touched that yote yet everything else were fighting over scraps. That's not the first time it's happened either.
BTW - I've got a bunch of those TNTs in 50s. I used to love them on fox out of my hornet. I bet on yotes at 22-250 speeds it would do little damage. one hole in and nothing out. But I still want to try to find a all around load for deer and yotes.