They are referring to the differing personalities among the three breeds of dogs.
They're saying a Lab is submissive and do what you tell it to, a Golden Lab is cooperative is you ask it to do something nicely, and a Chesapeake has an "attitude" and will only do your bidding if you explain your reasoning to him.
Sort of like the difference between cats and dogs - a dog will cheerfully do tricks for you, or sit or lay down on command. A cat will look at you quizzically as if to ask "You're kidding, right?"
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