Chicken breathing issues

Earlier today I cleaned a brooder of 15 chicks plus three guineas. I came back to check on an hour later and noticed that she was sitting in one spot gasping for air. icked her up and she even stayed still on my lap without being held. Eyes closed gasping for air.

The only thing that's changed is me cleaning their area so I decided to bring her inside, give her her own water and food and admittedly she is now eating and drinking but still lethargic.

Am I right to suspect the cleaning may have upset her lungs?

Is there anything else that I should do? She doesn't look to be gasping anymore but she is still lethargic.