Tug subscribes to the theory that a healthy Boston is a happy Boston. In addition to his daily play time (aka "waking hours") he practices Power Puppy Yoga. He specializes in the many positions known as "sleeping puppy" and, for maximum relaxation, performs them all in full-body contact with a human.
His sense of well-being does not extend to certain situations. At a pet mega-market he only barked at the Great Dane- never mind the smaller specimens walking about! He also did a head first dive out of the cart, deliberately, and I just managed to move the leash in time to keep him from hanging himself! Silly Tug!