" We do know, however that almost no animal routinely kills prey animal on an indiscriminate basis.
The only wild animal I’ve seen who will sometimes violate this rule is the coyote. Most of the time a coyote eats the animals he kills, but occasionally coyotes will go on a lamb-killing spree, killing twenty and eating only one. I believe it’s possible coyotes have lost some of their economy of behavior by living in close proximity to humans and overabundant food supplies. A coyote that kills twenty lambs and eats only one isn’t going to have to trek a hundred miles to find more lambs next week. Any sheep rancher will have several hundred other lambs that will be just as easy to catch later on, and the coyote knows it. Wild coyotes have probably lost the knowledge that you shouldn't waste food or energy. "

― Temple Grandin , Animals in Translation: Using the Mysteries of Autism to Decode Animal Behavior