Sounds like my lab, well, if you have any food nearby.
That sounds like my last two labs. They liked everyone. My current dog isn’t a lab. And the other day some semi-shady looking guy was walking door to door, supposedly to drum up business, and my dog just went ballistic when he saw him. This was the first time he has ever done that. A little bit after this happened I thought to myself that maybe this guy was just scoping out my house since before I opened my door the dog wasn’t barking and he was already half way out of my yard before I opened the door. If that was the case, he now knows I park my car in the garage and my dog doesn’t like him. I don’t think he will be coming back. LOL