I don't know if Daisy is left-handed, the judging by the way she wants to shake hands, my dog Worthless is. I'll be sitting there reading a book or watching TV and she'll come up and stick out a foot. Always the left one.
As far as intellect, she never ceases to amaze. During this winter's cold snap I ran across a large Carhart dog bed at the hardware store and bought it to put in the garage for her on those really cold days. I placed it in her carrier that is located near the front of the garage and she seemed to like it well enough. From her perch in the carrier she can readily see any delivery trucks coming up the drive and spring to greet them.
About an hour later I was about to go out into the garage and as I looked out the window I noticed Daisy had pulled the new dog bed out of her carrier and dragged it down between two vehicles and over to just outside the garage door to the house. In this location, I suppose, it would be easier for her to observe me coming in or out of the house.