The animals might be mythical characters, symbolic scapegoats, tribal families, mnemonic devices, or perhaps totemic scarecrows, guarding the pillars from evil.
The possibilities are limitless, as more and more application developers understand the power of the pen and multi-touch combination - for example, picture a unique way of sending personalized handwritten notes on Facebook, or even the fun of playing Farmville by drawing in your own crops or scarecrows.