Excellent
I was told that my cat, who for many suffered from recurrent cystitis, needed an operation to remove two large urinary stones. On the day of his appointment the vet advised me that from then on I should be feeding him only one food, and it should be a specialist urinary diet. I started immediately with the S/O Urinary from Royal Canin, and after a month we went in ready for the operation. The vet did an ultrasound and saw that the stones had already started to crumble, and the cat would not need an operation after all! We were delighted. Now we use the moderate calorie version of the food because our Ban already weighs 7.5kg. He's lost a healthy amount of weight and in short for me it's an excellent product. My cat no longer suffers from cystitis and I've saved a lot of money on vet visits and care, so I think it is worth the price!