Watch – Is This Dog Stubborn or Clueless? [Video]

So there's a bit of a debate about this video. Us dog owners know that there are plenty of stubborn pooches out there. But there are also some, let's say, "not so bright" dogs too. After watching pups run straight into closed glass doors, maybe this dog is just playing it safe. So check out this video and let us know what you think - smart dog being stubborn, or not the brightest candle on the cake, thinking that the door is closed?