Only Natural Pet takes 40% off one bag of Blue Buffalo Blue Life Protection Formula Dry Dog Food via coupon code "AFDNEWSBB". (For comparison, we saw 50% off in fall.) Prices start at $21.29 after coupon. Shipping adds $6.99, or spend $79 or more to bag free shipping. It's available in various flavors and bag sizes from 15 to 30 lbs.