it would be great if they could come up with something to stop coyotes, I was thinking a collar with metal sharp studs that shock the coyotes mouth, much like square 9 volt battery shocks a persons tongue if they touch it to there tongue to see if it has power in it. I think it would not hurt the coyote but i think something like that would scare it.
Owners would have remember to remove it from there pets if they want to take them out in the rain