I moved my moggy to my new house around midnight last night. It's now 2.45 am the next day and he still hasn't used the litterbox. I don't use clumping litter, just a litter box with drainage holes that collect the pee on the bottom tray. There was some liquid in today, but not much, and I can't tell if it's the water from when I washed it or pee, as there's no colour and no smell. Should I bring him to the vet? He doesn't have a blocked urethra or anything as he was peeing and pooping right up to when we moved.