Found her sitting down in the run, about a year old. No obvious deep injuries, but some feathers are missing, so I'm not excluding some level of throat injury. She's having problems breathing, breathes in, waits a second, breathes out with a light click. It's loud breathing. Not eating, not drinking, other than what I put in her beak, but no other symptoms. Eyes clear, beak clear, she's alert and aware and walks if she has to. Everyone else is healthy, never had a problem in the flock. She has full mobility of the neck. Any ideas? What can I do to help her?