Commercially produced grower diets for the period 10 to 30 kg liveweight normally contain 13.7 to 14.0 MJ digestible energy per kg. To achieve this level of energy, high energy ingredients such as fats or the higher energy cereals are necessary. These sources of energy normally cost more per unit of energy supplied than lower energy ingredients such as barley or wheat offal. Two experiments were conducted to examine the response of growing pigs to lower energy diets over the liveweight range 10 to 30 kg liveweight. In both studies the diets were given ad libitum as wet meal.