She is 19. At age 14 she had radiation therapy to fix hyperthyroidism. She has chronic kidney disease and has been on a veterinary diet since the thyroid was fixed. In the last 2 months, she has lost a lot of weight and is not eating enough. I saw the vet last month and she gave me some more food choices and instructions to give sub-cutaneous saline. The saline gives my cat a temporary boost, but the weight loss problem remains. She is cycling between eating and not eating while she purges her blood. I tried dripping tuna water over her food (KD) to improve her appetite. While the tuna contributes to kidney deterioration, the more immediate problem is wasting. I need a high energy food that she will take to build up some reserves.