I'll go with that and another poster. I haven't been too close to many but all I've seen were aggressive. A few years back I had to shoot one for an old boy. It was five years old and attacked his elderly wife biting off some of her fingers. He managed to pen it and called me to soften it's cough.I think the Chessie came before the Lab ! They are simply not Lab in Body or mind and honestly speaking a large amount of them have less than on par temperment