I noticed today that one of my hens, a 6-month old EE/leghorn mix (Rachel), is open-mouth breathing and seems to be holding her wings away from her body. I didn't see any obvious injuries or other signs of illness and she is the only one in my flock exhibiting this behavior. It's also a cloudy, breezy, 77 degree day today, so she's not too hot. She otherwise appears perfectly healthy and is out and about with the rest of my chickens foraging, eating, and drinking. She's also still laying eggs (as of yesterday, at least). Is this cause for concern? What might be causing her to behave this way and what should I do for her? I've attached a picture of her in case that might help.
Thank you!
Thank you!