I've determined that each dog averages about an ounce of water a day. Which means combined, my four dogs drink only four ounces of water a day! It was disconcerting at first, but they are plenty hydrated. My guess is that the dinner I am feeding them has a lot of moisture, plus it's winter, and we've been couped up with no walks. So, they aren't burning many calories, and their food has a high moisture content. It's like having a pack of tiny camels!