The liver is a remarkable organ with multiple functions, the metabolic functions are countless. The liver is intricately involved in carbohydrate, fat and protein metabolism, in storage of vitamins and minerals and in many other essential physiological processes. The high energy diets fed to pigeons in this highly competitive era are rich in fats and oils. These high energy diets can result in fat being deposited in the liver and abdomen, especially in highly stressed racing birds.