Terrier Max (Patton Oswalt) is coping with some major life changes. His owner (Ellie Kemper) is now married and has a toddler, Liam. Max is so worried about protecting the boy that he develops a nervous tic. On a family trip to a farm, Max and mutt Duke (Eric Stonestreet) encounter canine-intolerant cows, hostile foxes, and a terrifying turkey, all of which only elevate Max’s anxiety. Luckily, Max gets some guidance from veteran farm dog Rooster (Harrison Ford, making his animated-film debut), who pushes Max to ditch his neuroses, find his inner alpha, and give Liam a little more freedom. Can Max, Snowball, Gidget, and the rest of the gang find the inner courage to face their biggest fears?