Masterfeeds 14% Developer (pellet) is an excellent feed for broodmares, growing yearlings and two year olds. Well balanced protein, amino acids and energy levels, along with controlled starch content and premium mineral vitamin fortification, encourage balanced growth. The formulation is made to help reduce incidence of developmental problems. It is also an excellent choice for pregnant and lactating mares. The controlled starch content provides a safer choice for the mare, reducing risk for digestive upsets.