This is Katie. Katie is a German Shepherd, Pit Bull mix. Katie is too smart for her own good.
First Katie taught herself to open the sliding door from the outside by pushing the handle with her nose.
So it wasn't hard to teach Kate to open the sliding door from the inside using the same technique.
Then I rigged up a pulley system for Katie to use to close the
sliding door.
This also wasn't difficult because Katie used to pull the same green and white
knot to open the screen door at our last house. This may not seem like
much, but the screen door closed with a spring so she had to pull the knot then
get her nose in the way of the door before it closed.