Well, dogs have different ways of communicating. We haven't got tails to wag, so we have to rely on smiling and that, and hand signals.

After all, as Chesterton pointed out:

They haven't got no noses,
The fallen sons of Eve;
Even the smell of roses
Is not what they supposes;
But more than mind discloses
And more then men believe...

And Quoodle here discloses
All things that Quoodle can.
They haven't got no noses,
They haven't got no noses,
And goodness only knowses
The Noselessness of Man.