Free Hotdogs at Sonic! Today Only! 7/17! Posted on July 17, 2014September 10, 2017 by Utah Deal Diva This post may contain affiliate links. Read my disclosure policy here. 17 Jul Today at Sonic you can score a free Hotdog when you buy one! All you have to do is mention this ad! If you haven't thought of something to make for dinner tonight let Sonic do the cooking! (Visited 44 times, 1 visits today) Possibly the BEST Chocolate Cake you will ever eat! Friday Freebies ~ Ten Soda and Keebler Snack Cup!