Last week while the heavy-duty cleaning was being done in my apartment, I boarded the four cats at a boarding kennel Monday through Wednesday afternoon.

Then Friday daytime while the apartment inspectors were supposed to come, Elmer and Bob went to my sister's for the day.

Since then, Elmer has been sneezing from time to time.

Is there is something I can give him that might ease this? Or should I make a vet appointment for him?

Thanks,
Pat and Elmer