I have a friend that I was talking to today. We got to talking about dog food. One of her dogs, Mic, is eating Science Diet C/D. She really would prefer him to be on a better food, but said he has trouble with his kidneys. He develops Crystals and Struvites in his kidneys and doesn't do well on any of the other foods she's tried. I just left her a voicemail asking her what other foods she's tried since I forgot to ask her that earlier. I'll let you know what she says. I mentioned to her that I would ask around on Chaz and see if anyone has an idea of what might be a good food for him and will help out with his Crystals and Struvites problem.