Did you see last night's episode of Nova titled, Ape Genius, about the differences between humans and chimpanzees? In it, they showed an experiment where a researcher placed a dog treat under one of two plastic cups. The other cup was empty. The researcher points to the cup with the treat then tells the dog, "go get it" and sure enough the dog goes right to the cup the researcher indicated.It seems pretty obvious to me that a dog can smell the treat well enough to find it, even if he hasn't been prompted. I wonder how they controlled for that. They might point to the wrong cup and see if the dog still goes where he's told. But in that case, I wonder if it'd simply be an artifact of training and not a proof of what they were trying to prove (that a dog knows you're trying to help him).Here's a youtube video of it ( )