A golden retriever narrates a hilarious, heart-tugging tale of a dog and his humans as he tries to keep his family together while everything around them falls apart. Ever since Cosmo became a big brother to Max ten years ago, he's known what his job was: to protect his boy and make him happy. Through many good years marked by tennis balls and pilfered turkey, torn-up toilet paper and fragrant goose poop, Cosmo has doggedly kept his vow...