In dogs and cats, lower urinary tract disorders occur regularly. These are disorders of the ureters, bladder or urethra. A major cause of urinary tract problems is the formation of bladder stones. When your pet suffers from bladder stones, your vet will, in most cases, prescribe a special dietary food and/or medication and give some care advice. Royal Canin Urinary S/O is one such diet food. Royal Canin Urinary S/O Diet is specially developed to support the treatment of lower urinary tract disorders. Royal Canin Urinary S/O Diet helps dissolve struvite stones/crystals (bladder stones) and helps reduce the formation of bladder stones (struvite and calcium oxalate).