In the back of my old Pre-Calculus notebook, I found the mother lode. Here is an entire page of chicken doodles I drew for my little brother. Some of these made me, him, and our sister laugh until we couldn't breathe. Good times. (Click on the image to see it full size.)
And here's a bonus surfer chicken. The speech bubble coming out of his mouth isn't my handwriting; it seems one of my friends thought he looked more duck-like. And, really, it does make more sense for a duck to be surfing than a chicken, doesn't it?