The lead of the horror-tinged heart-tugger “Good Boy” is a copper-colored retriever named Indy who pads around an eerie house deep in the New Jersey woods investigating its mysterious creaks, shadows and smells. Like the Method-style actors of “The Blair Witch Project,” he goes by his real name onscreen. An ordinary dog without a whiff of Hollywood hokum, Indy doesn’t do implausible stunts like Lassie or Rin Tin Tin or comprehend anything that his owner, Todd (Shane Jensen), says besides simple phrases: sit, stay and, gratefully, the title itself. But we’re invested in the mindset of this mundane hero. His nose twitches are as dramatic as an ingenue’s gasp.
First-time feature director Ben Leonberg raised Indy as a pet first, movie star second. Along with his wife, Kari Fischer, who produc