Chick-fries, Chick-Tracts, ChickTract Farms, ChickFil-a, Chickfil-A restaurants are the stuff of restaurant lore.It’s easy to imagine how, after years of making it big, they’ve lost some of their trademark appeal.But while many of the original brands have disappeared over the years, some of the most recognizable are still around.Today, the biggest chicken producers in the…