Chickens are the most hopeless creatures. However, this particular group of chickens are extremely incompetent. After trying, and trying, AND TRYING, the road is littered with dead birds. But what happens when one chicken makes it?
"They came up with many more cunning schemes: a chicken chain, a disguise and a tunnel. The first resulted in SPLAT! The second resulted in quite a few SPLATS as well as a horrified driver, who had thought he had killed someone dressed in a long coat and trousers. The final idea, didn't result in SPLAT! But instead quite a few broken beaks as concreate is difficult to dig through when you're a chicken."