Reviewed by GREG KING Director: Lasse Hallstrom Stars: Dennis Quaid, Josh Gad, Peggy Lipton, Luke Kirby, John Ortiz, Bryce Gheisar, K J Apa, Britt Robertson, Kirby Howell-Baptiste, Pooch Hall, Logan Miller. What is a dog’s purpose? Is it to provide companionship, to help us overcome grief and loneliness, or is it to help us …