Royal Canin makes a variety called “Aging 12+” that is lower phosphorus. I buy the bag that has “Mini” on the side of it, which they say is for dogs up to 22 pounds, although any size dog could eat it. The Guaranteed Analysis on the bag says “Protein (min) 24%; Fat (min) 12%, and Phosphorus (min) 0.41%. The bag says it is “Easily rehydrated,” which is good, as our kidney dogs need lots of water. Some brands of kibble just will not soak up water. The prescription Royal Canin dry kibble, variety “A”, lists phosphorus as 0.27%. I have a vet RX for the prescription food, but I have been researching and it seems that protein does not usually need to be restricted until Stage 3 of chronic kidney. So I like that the “Aging 12” has more protein than the Rx food. I bought the “Aging 12+” at Petsmart, but if there is not one near you I’m sure you can buy it from Amazon or Chewy’s. It is very palatable; my Boston Terriers love it. Just be sure you get the “Aging 12” because there are also bags for “8” and “10” (referring to the age of dog, I think) and they are not lower phosphorus.
