If you think they are wolves come to Maine! It has been documented that at times coyotes do in fact take down moose. The coyotes here are known as the eastern coyote. They are a cross between wolve and coyote making the a hybred killing machine. Yes they take a lot of prey from the hind leggs as well. It is not uncommon for an adult coyote to reach 80lbs. here. However most that are shot or trapped are normally smaller as they are the younger ones.