Join Date: Dec 2010
Location: Virginia Beach, VA
I've not seen this particular behavior, but it sounds like she was spooked by the sneeze noise. She was in a deep sleep and a noise she probably did not recognize as coming from a human scared her. Since the only other being in the house she does not seem to care for is the dog she has directed her aggression at him. Roxy may have thought something like "Darn dog, I KNEW I didn't like that fur ball, WHAT is he up to now!??!".
After I adopted Lacey, I came down with a very bad cold. Coughing, sneezing, blowing my nose, etc., and all those strange noises unnerved her. She eventually learned it was just my way of being.
She will learn all of the family's strange sounds in time. I wouldn't worry too much about it unless it becomes a real issue with the dog. I'm glad you took Roxy in - hopefully you have had a vet visit by now and all is well.
Cat owners' prayer: "Lord help me be the person my cat thinks I am"