Why did the chicken cross the road? You see, a chicken's perception of of the definition of "space" is very different from mine or yours. Whereas we understand the linear definition of the boundries of the pavement and can make judgements on the future direction of moving objects, vehicles, if you will, the chicken may only see an unconneted patchwork of shapes and movemnets. It is my deduction therefore that the chicken doesn't even KNOW he's crossing what we would call a "road". Got that from a "Get Fuzzy" comic strip.