Church's Chicken has recently begun advertising some new chicken, bragging about the fact that they've gone back to the "original recipe." This is famously what KFC calls its fried chicken, in reference to Harland Sanders' original recipe.

KFC has sued Church's Texas Chicken, accusing the rival fast-food chain of violating its trademark rights in the phrase "Original Recipe."

KFC is taking one of its smaller rivals to court, suing Church's Texas Chicken for allegedly violating its trademark rights by using the phrase "Original Recipe" in pitching its fried poultry products.