Last month I took my cat to the vet for a check-up. The vet said he had a bad tooth that needed extracted. We took him in a couple days later for the surgery. When we went to pick him up the vet told us that she took an x-ray and it turned out his tooth was still in good shape and didn't need extracted. She cleaned his teeth instead and said everything was fine. It's been 3 weeks and it seems like he is drooling more than usual. Is that common after a dental cleaning?