Chaser isn’t just learning objects by name: she’s beginning to understand the basic structure of human language.
Chaser lying down.
Chaser is the border collie subject of this article discussing the inate intelligence of dogs. Border collies are among the smartest of canine breeds, as they’ve been bred for working with other animals. (Almost all such breeds are highly intelligent.)
The article looks at how Chaser exhibits a greater degree of understanding human speech than was previously thought possible.