Break out the cow spots and cowbells.

On Tuesday, Chick-fil-A restaurants nationwide are giving away free food from opening time until 7 p.m. for its 13th annual Cow Appreciation Day promotion.

But there’s a catch: You have to dress up like a cow.

“Adult customers who dress in any type of cow attire, whether it’s “’head-to-hoof’” or sporting a cow-spotted accessory, will be rewarded with a free Chick-fil-A entrée,” the company announced.

Children get a free kid’s meal for dressing up.

Chick-fil-A, best known for its chicken sandwiches, has a long featured cows in its advertising. The running joke is that the cows are plugging Chick-fil-A as a way of preserving their own lives because customers will eat more chicken and less beef.

Cow-clad customers have the choice of nearly every item on the Chick-fil-A menu except for salads.

Click here to read more.

SOURCE: USA Today, Kelly Tyko