Reuters is reporting that a Finnish inventor has applied for a patent on a battery-powered device that will protect dogs against wolf attacks. It's coat worn by a dog that shocks any animal that manages to sink its teeth into the fabric of the coat.

The dog-coat sends 1,000 volts of electricity through a predatory wolf when it bites into the outer layer, but is designed to ensure the pampered pet feels no pain from the jolt.

I imagine it could be useful against coyotes and mountain lions here in So. Cal.