Try getting your cat a water pet fountain that's BPA free. This helps quite a bit. I would get mine from Bed Bath and Beyond. Also, give Fancy Feast Gravy Chicken a try. As Furrballsmom suggested maybe some baby food. This worked on my dog, but I haven't tried it on my cat she is very picky. I would give the cat some probiotics this helps too. I would not overdo it with forcing her to eat the Hills KD diet food.. Her last time here should be enjoyable for her. But, as Furrballsmom suggested the different brands with low phosphorus. I'm not a vet though but have been through this headache with my dog not cat.