I see more wheezing when the winds pick up. And this time of year gets pretty windy, we've had some dirt devils come through the yard today that tossed some fairly heavy things around the property. When we go at least a couple weeks without any strong winds the wheezing mostly goes away. I suspect it has something to do with blowing dust. Birds have a much more complicated lung system than we do, and it actually takes two breaths to exhale what they've inhaled. So whatever they breath stays in the system longer. I suspect they suffer a mild case of walking pneumonia when the dust kicks up in large amounts... That's just my theory. I would say to just keep an eye on her and make sure she doesn't get any worse than she has, and maybe try some VetRx..