There are a series of YouTube videos of guys sitting in shelter pens with absolutely terrified dogs trying to win them over. This is time well spent since such animals have been ignored/mistreated and ended up in pens so they would simply not starve on the streets.
Win them over and you have a loyal pup for life. Take them home and they will attach to your kids like a leech. And, they will protect their new family like a Momma bear protects her cub.
So, there are guys are sitting in the pens and the dogs are running loose trying to decide if they want to take a chance on one of these penned humans? They're probably thinking how smart are these humans if they allowed themselves to be penned and how can they take care of me while sitting in that cage.