My beautiful "Mama" Nefertiri was diagnosed with a urinary tract issue which causes her urine to crystallize, leaving painful stones to pass that could and did block the passage of urine from her body on multiple very expensive occasions. Vet visits for her were over $500 per trip and the monthly bag of prescription cat food was almost $70. When her two sons also begin showing the same symptoms and received the same diagnosis, I knew there was no way I could continue to give them the SAFE nutrition that they needed and would not risk their lives, at that rate. I compared the ingredients in the prescription brand with that found in Purina One and found it entirely favorable so I thought I would give it a try; after all it was one third the price for a very large bag and the cats ALWAYS loved their monthly treat of a shared can of Purina soft food. I wasn't concerned, therefore, about them loving it, I was concerned instead, about whether or not it would be as GOOD for them as the prescription urinary formula food. It has been six years now, with Purina One Urinary Tract formula as their ONLY food, and all three are sleek, sassy, healthy, and happy cats. I recommend this to every person that I meet who has the same challenge when it comes to their cat or cats. This formula has enabled me to give my cats the high quality SAFE food that they needed rather than compromising their health due to my budget. I am grateful.