I think my hen is having trouble breathing! Please help me!

[Farmgirl283420]

My hen Marigold has something wrong with her. She is constantly sneezing. I believe it only started yesterday, and is breathing through her mouth. It makes a sound when she breathes, like a little gasp. She is drinking, eating, running around with the other chickens, and appears to be normal besides her trouble breathing. She is on organic chick starter (we have a rooster) and has access to grit and oyster shells. She does seem to not be feeling the best. Marigold is three years old now. This hen means a lot to me. Please help me!

 

[Farmgirl283420]

When I locked them up she was breathing really hard on the roost. I could hear and see her moving as she breathed. @azygous @Eggcessive @Wyorp Rock