BOGO FREE: Purina Dog Chow Dog Food Printable Coupon January 21, 2015 By: Tricie share Hurry and print this New Buy 1 bag of Purina Dog Chow Dog Food, Get 1 Free Coupon. Remember you can print a max of 2 per computer/device! Print all your coupons HERE before you go shopping! Please be advised that this post may contain affiliate links. See my Disclosure Policy for details.