Sausage Party was written by a cat.
Conrad Vernon ( born July 11 , 1968 ) is an American director , storyboard artist , writer , and voice actor , best known for his work on the DreamWorks animated film series Shrek as well as other films such as Monsters vs. Aliens , Madagascar 3 : Europe 's Most Wanted , and Penguins of Madagascar . Sausage Party is a 2016 adult computer-animated comedy film directed by Greg Tiernan and Conrad Vernon and written by Kyle Hunter , Ariel Shaffir , Seth Rogen and Evan Goldberg .