Testing our dog tail reading skills

http://www.bbc.co.uk/news/science-environment-24746107

"Earlier research had revealed that happy dogs wag their tails more to the right (from the dog's point of view), while nervous dogs have a left-dominated swish.

But now scientists say that fellow canines can spot and respond to these subtle tail differences."

The dogs in my icon were at a humane shelter and hoping I would take them on a walk.