The title of this new HBO documentary suggests a sort of heartwarming Puppy Bowl romp, with tales (and tails) of lovable pups and scampering, loyal dogs. The subtitle – Fear, Loss Betrayal – reveals otherwise. So be forewarned: This is a documentary about the more than 2 million dogs euthanized annually because of owner neglect and abandonment, about dogs that turn on their owners, and other less pleasant extreme stories from the often complex owner-pet dynamic.