 This research suggests that cats may be able to adjust their metabolism to accommodate changes in dietary macronutrients. Cats fed a high-fat diet gain more weight and fat mass than those fed a high-carb diet, while neither group showed any significant differences in activity levels. Additionally, cats fed a high-fat diet had lower insulin sensitivity compared to those fed a high-carb diet. This article was authored by Margaret A. Gooding, Jim L. Atkinson, Ian J. H. Duncan, and others.