Besides being sweet, this is some pretty cool video from a dog behavior point of view. Great play bows—you can see photos and read about them. The lifted paw is another friendly gesture. Want to learn more about canine body language? Check out Canine Body Language: A Photographic Guide Interpreting the Native Language Of The Domestic Dog, by Brenda Aloff. It’s an outstanding and very useful book.
The only thing missing is oodles of praise for Chaucer for being such a gentle dog!