Chick-fil-A invites customers to wear their spots, eat free and celebrate 21 years of the cows ATLANTA, 2016-Jun-28 — /EPR Retail News/ — Chick-fil-A® is issuing a cattle call! Mark your calendar for the 12th annual Cow Appreciation Day on Tuesday, July 12, 2016. On that day, Chick-fil-A restaurants nationwide will offer a free entrée to any…