Our black lab is eager to please, but not always too bright about it. So, I was very pleased to see that he is learning about parallel v. perpendicular. The problem comes from the fact that he chooses the narrowest part of the heaviest traffic areas of the house as his resting places: the top of the stairs, the walkway between the dining room and the kitchen, the hallway right between my office and the bedroom, etc. I'm sure that he thinks he is being a faithful guardian, but mostly he causes me to trip and drop whatever I'm carrying. So, lately, we've been making him lay on his bed under a table when he's in the way. He must have had an "Ah, Ha" moment because now he lays in the same areas, but parallel so we can walk past him without doing the tripping dance!