The collision between humans and monsters is once again recycled for family entertainment in “Smallfoot,” with the picture’s focus on neurotic, sheltered yetis about to have their whole world shattered. The feature is an adaptation of a Sergio Pablos book, but the production goes out of its way to be its own thing, eschewing a sustained run of madcap antics to become a musical of sorts, with periodic breaks in the action to do some singing and dancing. “Smallfoot” has color courtesy of co-writer/director Karey Kirkpatrick (“Over the Hedge,” “Imagine That”), but it’s a laborious film that’s too caught up in exposition to have much fun with itself, with an uneven balance of mischief and metaphor. Whatever amusement manages to make it all the way to the screen doesn’t last for very long.  Read the rest at Blu-ray.com