Casper, a livestock guardian dog, fought off 11 coyotes, killing eight during the attack. After disappearing for two days, he returned battered but alive. His o

Casper, a livestock guardian dog, fought off 11 coyotes, killing eight during the attack. After disappearing for two days, he returned battered but alive. His owner believes he spent that time tracking the remaining coyotes, and following the ordeal, decided to retire him from herding.