Heres what i see...
A dog, walking and looking into a small closet room, like a laundrey room.. then an infrared sensor kicking on a light or set of lights outside. A shadow moving across the yard and into the woods. Then, the blinds being pulled up, then shut.
Now, someone couldve been running around outside... who knows, a child taking a short cut home. The blinds, could have been done from who ever the dog was looking at in the other room. I say this, because i didnt see anyhitng hanging in front or beside the blinds... like ALL cheap aluminum blinds do. Also, the dog was looking up at someones face, not bankly at the wall in front of it on its own eye level.