Boz is being tolerant.
His new acquaintance, Bruno (aka Sausage Boy) is very young, and has a thing or two to learn about how not to annoy his older companions.
Boz will turn his head the other way. This won't stop Bruno. He'll just stick his nose in Boz's other ear.
Boz will get up and turn around, removing his ears from Bruno's reach. Bruno will lick something else of Boz's.
Boz will roll over. Bruno will nudge, nudge, nudge.
This will go on for quite some time until Boz finally tells Bruno, with a seriously scary bark, that he'd better quit it. Bruno will quit.
I'll enjoy that part, too, because Boz barks so rarely. It's a magnificent sound.