Over the weekend I had to leave my 4.5 month old puppy at a local kennel while I was away. Today I picked him up and brought him home, and he seemed very tired. I assumed he had played a lot and ignored it.

After going to a walk, I have realized that my pup keeps attempting to urinate, but only manages to get a few drops out. We got home and he drank 3 full cups, 24oz of water instantly. About a half hour later he was peeing great and back to 100%

Now, about 2-3 hours after giving him the water he is back to trying to pee with nothing coming out, due to his bladder being empty. What is wrong with him, I took him to the vet but he didn’t do anything or say anything for help, told me he was fine and all test results turned up normal.