I have an 8 year rottweiler with kidney disease – diagnosed about 6 weeks ago. He is taking Azydol and Rubenal. He was prescribed Hills Science Dog Food/KD. He is refusing to eat the dog food. I have found some recipies for making food for him myself, but most have too much protein in them. First of all, is there anything I can put over/mix with the KD food to make it more appealing to him? Do you have a recipe for food I can make myself? Thanks for your help.