I can't thank you all enough! I know a lot ot this is due to weather and environmental changes but it 's still irritating! Magoo is really stressed over this itching thing and when Magoo is stressed so am I!
PB and Lucky seem to ok other than runny ears.
Abigail seems to have responded to the humidifier and hasn't had another attack since. She does not have runny eyes or nose, just these coughing attacks occasionally.

Thank you all once again for your help. I will keep everyone updated.