My vet told me of a pack hunting his barn dog-Labrador. Five or six of them circling his dog when he started shooting them. When he'd killed a few of them, the rest finally took off.You need a Great Pyrenees. They will take down and kill coyotes. Not much they won't back down from. But typically a coyote won't get close enough. I've had four of them - three being working dogs.