Chicken Run (2000)

Ginger, Bunty, Babs and Fowler are chickens who are trapped on their farm and desperately want to escape. If they don't produce any eggs for the week, Mr. and Ms. Tweedy will have their heads. After every attempt, they fail and their time is running out. When it seems like all their attempts have failed, an American rooster called Rocky falls into the farm. Seeing Rocky flying, Ginger now realizes that the only way out now, is by flying. The chickens must learn the trade of flying before time runs outs.