Carole, my old vet only sold Hills food and this is what I used for quite a while when I still had Cirrus but only he ate it. Then when Storm had problems, he was also fed this food. At the time he was thought to have the calcium oxalate crystals instead of the more commom struvite. The ER vet sent me home with Royal Canin Urinary S/O which will help prevent both of these crystals. I was also told that if he ate the Hill's C/D and had the oxalate cystals then this would be very bad for him because they only help prevent struvite crystals. My old vet didn't want to have to carry Royal Canin Urinary S/O so I ended up finding a different vet with much better hours and it's also open 7 days a week. He's still eating this and doing very well. I also think that the ingedients are better than the Hill's. Since you just bought Hill's then try it and see how Lexie likes it and if it will help her crystal problems. If she doesn't like it then I'd try the Royal Canin.Originally Posted by carole
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