WARNING!
Recommending diatomaceous earth is not a good idea for any animal in renal failure. Specifically, it is a natural diuretic, so if the animal isn't drinking enough water, it will dehydrate the animal more and will increase BUN and Creatitine values. Also, it is known to cause kidney stones in animals that do not drink enough water. Plus, if the animal is already on a blood pressure medication, it will interact with it.