Hi - my 17 year old cat has been diagnosed with chronic kidney disease, so I'm feeding him (or trying to) prescription food for kidney disease. I've tried Royal Canin, Pro Plan and Hill's and the only one he'll even come near is Hills K/D Chicken and Vegetable Stew. But, he doesn't each much of it. Can I safely add a little chicken stock to make it tastier? I assume there's a low-sodium chicken stock (with no garlic) available but I want to make sure it won't mess with his hydration issues. He doesn't like any seafood flavored food, so tuna juice, etc. wouldn't work. I'm giving him subcu fluids twice a week. Thanks for any feedback! Lea Ann