I just saw this on Google.
I can hardly believe it, how can it be 20 years already.
Anyway Wallace and Gromit are one of my favourites.
Such is the power of animation. If he were a real dog, Gromit would be dead by now.
I just saw the Google logo too. 
I liked the first couple of W and Gs but thought last year's was not quite so funny.
Gromit rather spoils you for normal dogs doesn't he.