We have a girl who's about 9 months old that we noticed lingering in the nest box late yesterday afternoon, looking sleepy. I thought maybe she was just tired from laying her first egg so I didn't worry too much, but checked this morning and she was very lethargic, and didn't want to open her eyes. She's one of four, and the others all seem perfectly healthy. She also looked perfectly healthy until this morning. I brought her inside the house and now her breathing is very labored and she has white runny poop crusted on her feathers, and she is lying with her head and tail down. It seemed like her nose was running this morning, and now her mouth seems a little slimy, but her comb/feet/everything else looks normal. No changes in diet or anything else I can think of. The chickens get the run of our yard most of the day and are shut in at night. We don't leave anything chemical in the yard where they could get to it. We do have a wild bird feeder, and sometimes the chickens come and eat seed that's been spilled on the ground. I have called three vets now, and none of them will see a chicken. Not that I am anxious to spend hundreds on a two-dollar bird, but I can't stand to see her suffer. Does anyone have suggestions?