I've had three kidney dogs. All ate the Purina brand food, which I chose because it was the least expensive. Billy lived until he was 12 1/2, Beggar until he was a month short of 11, and Oliver until he was 10 1/2. I had no problems with anyone eating the food, and was told that any treats given during the day could be "regular" treats, not kidney ones. They all were on it for years. My Sasha will be 8 in January, and just had her yearly checkup. Her kidney test showed +1, and that will be redone tomorrow when she has her dental. If it stays +1 I'm not going to change her diet, but I've been put on alert. If and when it comes to pass that she needs the special diet, I will order it from Chewy. My vet only carries Royal Canin specialty diets, and they are ghastly expensive. Perhaps you can find some appropriate add-ins for the food, to make it more tempting. The reality is that you can only do the best you can do, and eating is better than not eating. Perhaps she will go with 75% kidney, 25% regular. Perhaps a dollop of kidney wet smooshed around the dry will tempt her. Or, a dollop of ANY wet dog food will help. Or something leftover from your dinner, for that matter! Again, you can only do the best you can, and sometimes that means compromising. You will figure it out, I'm sure.