My sister's 18 year old SF has lost about a pound over the last year or so. (from 10 to 9 pounds) She had a complete physical and all her blood work came back within normal limits. It seems as if she has lost some of her sense of smell and will only eat the smelliest of food. Right now she's eating Friskies pate fish varieties as she lost interest in the "meat pates". She eats one 5.5 oz can a day plus 15 or so treats. My sister wants to supplement her diet with something high calorie to keep her weight up. She's fairly active, climbing the stairs often as she keeps track of the goings on in her three story home. Anyone have any suggestions?