Dog (out Mar 17) is the kind of movie where you know what'll happen from the outset. A former U.S. Army Ranger suffering from PTSD (Channing Tatum) befriends an ex-military dog battling demons of her own. The film struggles in trying to be both a light-hearted canine flick that families can enjoy, and a darker tale of war, PTSD and suicide. Well-intentioned but not particularly deep or memorable. Grade: B-.