My chicken had pneamonia for awhile so she was put in the house untill my family could no longer stand the smell of a chicken in the house... She was almost better when I put her out with the coop. But ever since she was sick she can't fly.... Not even knee hight and she used to fly like 3 and a half feet in the air to get on the perch before.... I've seen her try... But all she dies is hop... What's wrong!!!!!