border collies lol I have been around mahy differnt breeds and border collies just pick things up easier, I agree that youi can teach any dog well, i mean look at blair one might consider him smart as a freetyle, agility and flyball dog, but he is actually extremly stupid lol no offence to him but he is as dumb as a doornail! however I think smart consitutes as dogs that pick up on things that they were never tought, for example Happy can find something a mile away by simply describing it to her, I did not teach her to do that, I was just trying to find something that I dropped so I described it to Happy and she found it lol I did not teach her to play ctach with me or how to play basketball or soccer or football but she can do it all, and usually win lol I did not teach her what any of her toys names are, I just make up a name and ask her to bring it, she will find what she thinks I am asking, point at it as if to ask if this is the toy I want I say yes and she brings me the toy. she will go anywhere I ask, she will go where I point and from there move forward, backward, side to side, sit, down, stand, whatever in that spot, I did not teach her to do any of that she has just always done in in her own. Perky is not a BC but I believe she is equally as smart, because she can problem solve, when my dad left a hunk of cheese on the top of the desk he moved the chair to the other side of the room so the dogs could not get it, Perky proceeded to push the chair to the desk, and use it to climb on the desk and eat the cheese, when she wants the house to herself she gets the dogs all riled up, then runs to the door while they are all in a frenzy askes to go out, you open the door the rilled uo dogs get exited and run outside, meanwhile perky has got the house to herself with the object of her disire lol that is what I call smart, not what you can teach a dpg but what a dog can figer out for itself.