Now with Outlast® Gastric Support Supplement! For foals, weanlings, yearlings, and pregnant or lactating mares fed with foals. It took over 100 years of industry-leading research and innovation to build today’s Purina® Omolene® horse feed lineup. We started with naturally nutritious high-quality whole grains packed with antioxidants, phytonutrients and prebiotic fibers. From there, countless nutrition studies and feeding trials at the Purina Animal Nutrition Center led to scientific breakthroughs that keep our formulas on the cutting-edge of equine nutrition and performance. When there’s greatness on the inside, it shows on the outside. Click here for guaranteed analysis and more information.