I've seen that video before, too, and it makes me feel sick. I could never do that to my dogs. They have no IDEA what we're talking about, and as Dave and Karen suggested, they are responding to the environment - and to the voice and behavior of the human.
Ummm - that was a boy who left. (I think?)
Don't mean to burst any bubbles - but it really does help to study dog body language. For instance, look for the works of Turid Rugaas, available, for example, on Amazon. I'd start with her book and DVD on canine calming signals.
THAT would really open your eyes, and give you very treasured information!
And I have an article on my site that might be helpful (and several other allied articles).
A long article that tells some stories:
Hope you find these helpful.
Mon, 23 Jul 2012 16:10:08 (PDT)