Umm....let's see. If coyote has mange, put coyote into plastic trash bag, spraya large amount of ether into bag, light match, hold match to opening, jump back, watch as vermin explodes and bar-b-ques. Just kidding, I agree with Howler, a flea bomb should work just fine. Just make sure you don't place them in the back of an SUV, or in the toolbox of your pick-up, in case the bag isn't tied as securely as you think. Otherwise you might end up with an unwanted flea infestation.