Cadbury actually did some other really nice animatronic ads with a cougar, hyenas, and a sheep:
http://www.character-shop.com/puma.html
http://www.character-shop.com/hyenas.html
http://www.character-shop.com/sheep.html
Part of an ad campaign "Your Happiness Needs Cadbury's" where people's "inner happiness was represented by an animal" Some really nice vixes on the page.