I came back from work today and found one of my ameracuana hens on the roof of the chicken coop. She was breathing heavy and stretching her neck out trying to gasp for air. I put her inside the coop and things got worse. She started vigorously shaking her head, jumping up and down, and trying to gasp for air. I put her my house in a large dog crate with food and water. She is still showing the same sympotms and instead of pooping she is secreting a white fluid. Please Help, she is one of my favorite hens and I would hate to lose her.