First off, thank you so much, Dr. Rachel Boltz, for writing and posting your Article in the Blog section:"A Scientific Take On Cat Nutrition", here on(TCS), the Cat Site 1. In CKD cats, have there been any studies done on prescription diets...versus cats eating OTC foods with phosphorus binders? 2. In early stage CKD, how does a Vet determine which food, prescription or OTC, would be best for the cat? 3. When would you determine that 'canned kitten food with a phosphorus binder' would be more helpful, in a senior ckd cat? Is it based solely on weight loss, or on blood chemistry numbers? 4. Do Vets keep a record of what their feline kidney patients eat, or any type of central data base? That may be too many questions, but I am really interested in #1 and #3. Thank you.