Sonic Corn Dogs- 50¢ Corn Dogs All Day The links in the post below may be affiliate links. Read the full disclosure Here.February 16, 2017 by SMFM Leave a Comment Sonic is offering 50¢ Corn Dogs All Day today, Thursday February 16, 2017! No coupon required. Just mention when you order. Check with your local Sonic to make sure they are participating before heading out.