Rossi was admitted to the surgery and sedated so a catheter could be passed to allow him to urinate. The cause for his blockage appeared to be urinary crystals which can form into larger stones in the bladder – radiographs revealed that he had several of these uroliths (stones) causing the problem. Depending on what type of urinary crystals make up the stones, they can sometimes be dissolved with a particular type of prescription diet. Unfortunately, not all types can. A sample was taken and sent off to the lab for analysis. In the meantime, a catheter was sutured into place so Rossi could pass urine into a collection bag.