Not to belabour this or anything but...
Chicken Run was ripped off from a short story written in the mid 90s by a (fairly hip) Russian author.
http://pelevin.nov.ru/pov/en-hermit/1.html
I looked at my IMDB history recently and was sad to discover no one gives a flying f-youknowhat when I posted it years ago. I am posting it again now. It made me sad because I know America will choke on itself and I believe that any little bit of effort to smash up the poor country's smugness and isolation must be of world-altering importance. It makes me sad to have to think about that and do that kind of stuff. Whatever - the link was dead anyway...