Give your outdoor dog clean drinking water. No more stagnant, and potentially unhealthy, drinking water. The WaterDog is an automatic outdoor pet drinking fountain. WaterDog works by activating a stream of water when your dog gets within 3-feet of the fountain, and turning off when your dog walks away. All you need is an outdoor faucet and 4 C-batteries (up to one year). Video of the WaterDog automatic pet fountain after the break.