My dog goes on high alert whenever anyone walks by the front door. Even if it's someone she knows and loves...she just doesn't trust anyone until they're inside and she's given them a thorough once-over.
It's great for protection, but it can also be super annoying after awhile.
This dog, on the other hand, knows exactly who to trust -- and precisely who he should never trust. Just watch as his dad tells him which treat is from which person...video-player-present
What a smart pooch! I know my girl would walk straight up to anyone, even the dog catcher, if they had a tasty treat in their hands. She's not trusting...unless they have food for her.