My kitty Dusty is 8 1/2 years old and has CRF. She has been losing weight. She has had regular vet visits and its my decision not to continue to medicate her. I'm now looking for suggestions on what I can feed her to get her to gain a little. She is long-haired, so it's hard to see how skinny she is, but I can feel every rib and vertibrae. She eats about 1 can of 9 Lives canned per day and I will give her more if she will eat it. Should I try feeding her butter or cream or anything else to fatten her up?