Universal | Illumination joinced Big Heart Pet Brands, makers of Milk-Bone and Pup-Peroni, to celebrate the theatrical release of THE SECRET LIFE OF PETS with "THE SECRET LIFE OF PETS Dog Snacks Prize Pack." Consumers were given several ways to enter, like folowing @PetsMovie on Twitter, for the chance to win a pet prize pack that included a keychain, buttons and tennis balls as well as assorted Milk-Bone and Pup-Peroni products. The company also created a line of movie-themed pet treats exclusively for PetSmart.