Hill's Healthy Development Medium Puppy Food offers precisely balanced nutrition to support immunity and mobility. With clinically proven antioxidants and DHA from fish oil. Recommended for: Puppies of small and medium breeds from weaning until 1 year old Pregnant and lactating dogs Key Benefits Clinically proven antioxidants for a healthy immune system. With omega-3 and optimal mineral levels for mobility and skeletal development. High-quality ingredients for gentle, healthy digestion and great taste. 100% guaranteed.