Purina(R) Ultium(R) Growth Horse Formula is a super-premium, high-fat, high-fiber horse feed researched and formulated specifically for broodmares and young growing horses. Backed by scientific research spanning over four years monitoring and measuring growth curves, body condition, joint health, activity levels, blood work and more, this unique, industry-leading nutrition supports the development, growth and adaptive physiology necessary to produce a strong, healthy, athletic horse. | Purina - Ultium Growth Formula Horse Feed | Size 50 lbs