Hello I have a Buff Orpington hen she was very healthy and all of the sudden she is now breathing and making a load scratchy sound. I opened her beak to see if she had some sort of signs of canker but is all clear. When she would inhaled I can see a circle airway opening and closing. Her comb is a bit lighter than her usual red comb. No wateryo or swollen eyes or foaming in the mouth. I have quarantine her and brought her inside into a doggy cage to keep her warm. I am in North Carolina and we’ve had frosty mornings but no lower than freezing temperatures. This is my first flock and I have 4 beautiful hens. Please help we have fallen deeply in love with our girls and would hate to loose her. I have attached a picture of her of this past summer. She is much bigger now and with a beautiful big comb.