There is a use for that chicken, eventhough it wasn't intended. Grab the chicken in the windmill, then put on your Hover Boots. Now run out of the top hole and then turn the corner to the left and start running towards the fence. Let the chicken take you to the fence, then when you hit it, press your sword button. If done right, you will be over the fence and you can walk around. Don't fall off the edge or it will take awhile to get to the bottom.