Dogs are way smarter than we give them credit for.
Sometimes we can be pretty quick to write off our own pets as pretty dim while we watch them lick themselves for twenty minutes or run to the front door when a doorbell rings on TV. And they aren't exactly giving us Einstein vibes when they sit in front of a window and bark at their reflection.
But as it turns out, our pups are full of more than just unconditional love; they're also full of social awareness. In fact, one study has confirmed that dogs are actually pretty good at getting a read on people, and can tell if someone is trustworthy or not.