I've been treating Bear for high urine pH (8.4) over the past 2 months. The initial urinalysis showed crystals in the urine which a course of antibiotics cleared up but the pH didn't drop. The vet had me give him vitamin C for about 2 weeks, but it's still just as high. The vet wants me to just keep an eye on him and if he gets crystals again we'll have to put him on w/d. No one seems to be able to figure out why it's so high so I was wondering if anyone has any recommendations or experience with this type of problem?

I should add he's never shown any symptoms and the blood work showed normal kidney functions. He has a slightly elevated thyroid level and one of his liver enzymes is a little elevated.