Dairy cows and sheep in negative energy balance try to compensate for this by mobilizing their body fat. If the capacity of the liver to metabolize fat is not sufficient, and fat is metabolized into ketones, this results in ketosis. To avoid these problems it is important for the animal to increase its energy intake as soon as possible. Farm-O-San Pro-Keto is a dietetic feed that contains large amounts of glycogenic energy and is able to reduce the risk of ketosis.