Julia Louis-Dreyfus and Bryan Cranston play British sheep turned ace detectives when their shepherd (Hugh Jackman) dies under mysterious circumstances. There’s currently one solid film out in theaters that uses barnyard animals as a vehicle to explore the dangers of groupthink and anti-intellectualism, and that film is not the one adapted from George Orwell’s “Animal Farm.” It’s “ The Sheep Detectives ,” a cute, funny, and earnest mystery that plays like a kiddie version of an Agatha Christie