What is the Most INTELLIGENT Dog you have owned and Why???

Every dog I've got has done something to amaze me but my old cur dog Chockie is Probly the smartest. He's not the most energetic dog but get him on fresh sign or down wind of a hog and he's going to it. The best part about him is his desire to please me. He will do anything for me. I use him to retrieve ducks, work cows, squirrel hunt, coon hunt... you name it. He knows every bit of body language that I'm capable of. He knows when to stay and when to come without me telling him. I can point my thumb to the bed of the truck and he's loading up. Never once in his life has he ever stopped in the house or even in the yard. He doesn't beg for attention. If you're petting another dog he backs up and watches you. The only thing he does wrong is when he sees you with a pill or a syringe, he's going to hide. He HATES shots and medicine. Even if you hide it behind your back he just knows what you're doing.