No cow costume...? Really...? Then you can just use the Chick-fil-A Costume Kit. You just print, cut out and clip or pin on your favorite cow look. This is the route I took last year.
If you've never been to Chick-Fil-A on Cow Appreciation Day, you're missing out! Not only is there a free yummy entree in it for you, but free entertainment as well. The kids and I had fun last year, really! Let's just say that not everyone uses the print out costume kit and we saw lots of wacky cow outfits pass through the door. It's so worth the trip!