I have been through renal failure in the past with pups. My Cody who passed in 2006 was with me for 4 years...I adopted him at the age of 8. He did very well on Purina NF until the last six months of his life when he stopped eating and was failing. I consulted with a vet nutritionist and he did very well on a home cooked diet....he was almost ready to go to the bridge when we opted to do that and it gave him an extra 6 months.
Since you seem to want to add things to your pup's diet, I strongly recommend that you consult with a vet nutritionist. They can advise you best about diets. You can find one at
American College of Veterinary Nutrition
Good luck!
