Every dog I've known always makes a beeline straight for the couch. However, if your more compact pooch fancies sitting with the family but can't quite make it up onto the chair, this hack of an IKEA chair into a stool with its own on-ramp and extra wriggle room might be just the ticket.
At IKEA Hackers, Jo details how he converted a chair for the pleasure of his dog King. The particular model he uses isn't sold in Australia, but the $69 Agam could serve a similar function. Or you could just let the dog stay on the ground.
Dog chair [IKEA Hacker]