We have a problem with one of our blk austrolorps. Last night upon shutting up the girls, I found one perching and breathing heavy. Loud enough that I could hear her. I let her be for the night and this morning she is still doing it.. she was outside with the flock, but just standing there, seemingly uninterested in feeding time. As she breathes out, she extends her head up and out, opening her beak halfway to exhale loudly. She sounds kinda wheezy and obstructed. We have checked vent, and crop. Her crop was hard to feel, maybe because she has not eaten(?) She seems to be getting weaker. I hope that someone here can help! We'd really appreciate it! -Tom and Joe.