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"Royal Canin Veterinary Diet Feline Urinary SO 33 is recommended for cats with the following conditions: Cats with or at risk of developing feline lower urinary tract disease, Dissolution of pure struvite uroliths, To help prevent struvite urolithiasis, To help prevent calcium oxalate urolithiasis, To help prevent calcium phosphate (brushite) urolithiasis.\r\n\r\nCats often suffer from lower urinary tract disorders that affect the ureter, the bladder or the urethra. One of the most important causes is the development of urinary tract stones, which typically consist of struvite (composed of magnesium, ammonium, and phosphate) or calcium oxalate (composed or calcium and oxalate). \r\n\r\nVeterinarian Approval Required  This product may only be purchased with the approval of a veterinarian and may require verification of a prescription before it is shipped.  We will collect any necessary information at checkout and verify a prescription if required. "^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.petflow.com/product/royal-canin-veterinary-diet/royal-canin-veterinary-diet-feline-urinary-so-dry-cat-food>