Click the dog or cat challenge buttons to get a coupon by mail for a Free (up to $9.99) bag of Purina ONE Dry Dog or Cat food.

‘When you feed your pet Purina ONE, you could see a difference in 28 days or less. Over 425,000 others have accepted the 28-Day Challenge to see a difference in their pet, from healthy energy and a shiny coat to bright eyes and strong, healthy teeth and gums. What difference will you see?’