Formulation of layer diets can be carried out by introducing ISOLEUCINE and VALINE as nutritional constraints, replacing protein as a constraint. If this is not possible, these are recommendations for a minimum of protein for feed containing or not containing Meat and Bone Meal (MBM).
From a practical point of view, we estimate that it is necessary to increase the concentration of amino acids by about 6 % during the 18-28 weeks period in relation to the feed consumption observed after 28 weeks. Total or digestible amino acids levels are established for a production of 59.5 g egg mass per day.