You're added.. AuntB, please try homecooking for your dog... that is the only way to be really safe and it's not all that difficult once you get in the swing of things. I know a lady who runs the Cushings/Immune Disease list has 11 dogs and she and her husband home cook for all 11 dogs ~LOL~ now THAT is dedication.
Are you seeing signs of kidney failure? If so, you may need to do a kidney diet and do some sub-q's..