Even if your puppy was healthy I would not recommend it but considering their is
renal disease, a veterinary approved
diet is what is necessary. R/D is a balanced
diet, even for a growing puppy. In fact their is a food made from Hill's called K/D that is specifically designed for renal disease. A study was done years ago out of Colorado state university that showed even puppies fed k/d; a protein restricted diet, received all the necessary nutrition for a healthy life.