My Samson drinks a lot of water. He would leak pee sometimes because his bladder was so full. I brought him to the Vet and we ran several tests over a couple of months. It turns out his issue is behavioral. He just likes to stand and drink. We have to tell him enough sometimes when he starts drinking too much. I would take him to the doctor to be checked out. It's better to rule out something serious. Drinking too much water can be harmful too.