Of all the animals mankind interacts with on a regular basis, dogs have always seemed to be the most in tune with our emotional states. New research has attempted to examine why that might be, and scientists now believe they have evidence to show that dogs are incredibly adept at learning human facial cues. As it turns out, dogs really, really want their human companions to be happy, and may even share the reliance on the hormone oxytocin to promote social bonding with their two-legged caretakers.

For more see:  Study reveals dogs are programmed to want to us to be happy