We have gone thru the antibiotic routine a few times with our guys. The small black cat we used to have (she moved in with a friend of mine to be an "only cat" and is much happier now) used to get the upper resp. gunkies on a regular basis. Not that it is a pleasant sound to have to listen to but little cat sneezes are almost funny...anyway it always cleared up within a few days of the antibiotic so there is light at the end of the tunnel! Sending lots of hugs and healthy thoughts