A buddy comedy about the mutually life-altering friendship that forms between Channing Tatum and a Belgian Malinois during a wild road trip from Montana to Arizona, “Dog” is the kind of movie that will divide audiences into two uneven camps: Those surprised to discover that it’s actually good, and those disappointed to learn that it’s not astoundingly great. The first group, all of them fools, walks into this thing expecting to see a goofy jock take his “steroidal puppy” screen persona to its logical conclusion. The second group, having been sanctified by the divine light of masterpieces like “She’s the Man” and “Magic Mike XXL,” readies themselves for another chance to see one of the most unpretentious movie stars of his generation leverage his meathead physique into a perfect vessel for exploring the softer side of masculinity. - David Ehrlich