If the water bowl is empty dose the pup search water out? Just my old border collie had diabeties & she would drink heaps & wee heaps, & if the bowl was empty she would try & brake into the tolit by trying to tear the door down. Oh & empty any pot plant holders.
The vet said diabeties untreated give them such a thirst they will do anything to get water.
Probley not your pups prob but just thought I would mention it.