Ok thanks! Yes he has access to lots of fresh water and seems to be drinking quite a bit. And his appetite is good.Make sure he gallery of water. Anesthesia causes diarrhea too. I'm sure it's stress. Poor little boy!. He'll come around, he just needs to get over all this and he'll be fine. It just takes time....
I forgot to mention he had to have liquid pain medication for a few days after the surgery too - yesterday was his last dose. So maybe that messed up his system as well.
Hopefully it will resolve soon... he is a challenging case but you are giving me hope!