Just a footnote to add to Mpira's repertoire of tricks.
He has now learnt how to roll over and wave his paws in the air on the command of 'Bang!'. He just hates doing it.
He looks at me and I can see from the glint in his eye that this trick really is so demeaning and humiliating to do. It requires complete submission. I mean, it's admitting - in public - that he is inferior to us. He believes he isn't: he's just another - equal - member of the family.
It's a hard life being a dog sometimes.