Here is an article regarding chronic kidney disease in cats and dogs:

Here is a list of kidney prescription diet recommendations- preferred canned food but dry is okay, for any of the listed diets

-Hill's k/d diet 

- Purina NF

- Royal Canin Renal Support

There are multiple flavors and types, we may need to try different brands to see what your pet will eat for us.

 Slowly transition between your pet's current diet to the kidney diet over 3-5 days in order to avoid causing any GI upset, like vomiting or diarrhea.

The easiest way to purchase one of these diets is online. Otherwise you'll need a digital prescription for in-store pick up like at petco or petsmart if they keep them in stock.

Let me know if you have any other questions!