General information: Please seek your vet's advice before using this food or extending the feeding period. When feeding your cat with a veterinary diet you should consult your vet regularly for check-ups. If your cat's health deteriorates please seek veterinary advice immediately. Royal Canin Veterinary Feline Urinary S/O in Gravy is specially formulated to specifically support the treatment of cystitis and urinary stones. This food can help to dissolve painful struvite stones and crystals as well as calcium oxalate stones. It simultaneously works to prevent new stones from building up and reduces the risk of cystitis. The special ingredients increase the volume of urine and optimise the RSS value. The recipe also ensures that your cat receives all the vital nutrients it requires for a healthy immune system. Royal Canin Veterinary Feline Urinary S/O in Gravy contains the urine acidifiers calcium sulphate and DL-Methionine. It is also low in minerals, which makes it harder for crystals