Draw a Pig
I came across this site http://drawapig.desktopcreatures.com/ while looking for psychological drawing tests.
Teaching children to draw gives a good insight into how they think and see the world. I was surprised to find that children in London still draw houses with smoke coming out of the chimneys even though most have never seen this happen. But then, most houses still have chimney pots even though they are not used. Children draw what they think as against what they see.
Pigs are difficult animals to animate. They don't have hand-like trotters; vary little in features, and typically described as fat-ugly-greedy-dirty. In fact a good cliche for all we dislike, and this may be because in some ways they can appear quite human; more so than a cat or dog.
Thier place in animation is to represent the villian as in 'Animal Farm'. Of course, we all love Miss Piggy in the Muppets, but that because she associates with other loveable characters.
Foxes and Wolves are also villians while dogs are heroes. Cats seem to take on any role, as do monkeys, while horses are always good.
The psychological links between people and animals has always been exploited, and never more so than in animation. Drawing animals gives some useful insight into how we see the world.
Some more drawing test sites: Psychological Drawing Tests