What I have found on several websites, people of Lancaster, PA aren't allowed chickens at all. I'm sorry I can't help any further.
http://lancasteronline.com/news/local/lancaster-city-won-t-allow-keeping-of-chickens/article_3fc7bb08-f32e-11e4-b1aa-0f94b196733d.html
Who told you that you needed 5 acres of land for one chicken? That is a complete lie. Where are you located? I will look up your chicken ordinance laws