Kim, I'm so sorry that you had to deal with the dreaded Dr. B. I'm sure that the mass that was seen on the x-ray is a stone so please try not to worry too much. I'm glad that you'll be able to go to your vet tomorrow and hopefully he'll be able to help poor Pouncer. I would also think that they'd catheterize Pouncer because of his history of crystals and the possiblilty of a stone. Lots more prayers and positive thoughts are being sent his way. Please take care. (((HUGS)))