FREE $20 Dingo Dog Treats Coupon January 23, 2011 This post may contain a link to an affiliate. See my disclosure policy for more information. Head over to the Dingo Facebook page, ‘Like’ them, then click on the ‘Join My List’ tab and join their mailing list. When they get 25,000 fans, you’ll get a FREE $20 Dingo Dog Treats coupon! Thanks, Mojo Savings!