Alex Wong/Getty Images)(CNN) - Tuesday is Cow Appreciation Day, when Chick-fil-A fans across the country indulge in a little light bovine cosplay for free food. The chain is offering a free breakfast, lunch or dinner entree for its customers, but there is a catch: People have to dress up like a cow to get it. What does dressing up as a cow entail? Or does one need to stoop to silicone udders to secure that sweet, sweet free meat? And yes, your suspicions are correct: Cow Appreciation Day is, in fact, the invention of Chick-fil-A.