Man’s best friend becomes his worst nightmare when a horde of bloodthirsty wild dogs descends upon a family’s farmhouse in a fang-bearing fight for survival.
Multiple pets are implied (deaths not shown but the aftermath is) to have been killed by the pack of dogs and multiple dogs are killed by humans in self defense.
The movie opens with a horse grazing in a pasture before it gets spooked and runs away. We then see a pack of dogs chasing it. The scene ends with the horse surrounded by the dogs, but the horse's body is later found.
A few minutes in, Joe Don Baker's character is with his wife when his kids say his dog has found something. When he goes to look, it switches to an extreme close-up of a dead horse.