If you have a young child you probably know what I am talking about.
Duck - He seems to be the product of a poor upbringing. He lives in a nest not a house (or anything really similar to a house) like the rest of them do. He also seems to be the most uneducated one.
Frog- He's a slum lord. He lives in a nice uptown log while he makes the bugs live in the mailbox.
Sheep - She's the token crazy person. She spends most of her time pretending to be something else.
Bear - She's the survivalist. You don't see her often and she lives in a cave. I think that if there really was a zombie uprising she would be the one to survive.
Pig - He's the middle class average guy, however I think he might be a closet bulimic. I mean he eats all the time, and all this junk food and never gains any weight.
Dog - He's God in Word World. Think about it....he is the one that creates the others in the beginning of the show. He lives in the biggest house. He doesn't actually talk so he sometimes is misunderstood...and what do you get when you spell dog backwards? Case closed