High yielding Dairy Cows will milk 'off their backs' during early lactation. During this period poor appetite may also reduce dry matter intake. These factors result in a negative energy balance which can affect milk yields, fertility and may cause Acetonemia (Ketosis). Ketosis may be sub-clinical and thus barely noticeable, even so, it can further reduce appetite, creating a vicious circle. Dairylac will supply a concentrated source of energy that is digested with an efficiency of over 95%. Because the energy in Dairylac is protected, it does not interfere with rumen function, unlike some other non protected oils and fats.