HI. I rescue a 3 year old cay from a very good, local, no kill shelter. I took Sabboth to the vet 4 days later for a check up. He was scratching his ears alot and Drooling ALOT. My vet said he had some ear mites (thus the scratching) and gave him Revolution as a treatment. It has worked. But when I mentioned the drooling, he looked in Sabboth's mouth and showed me where, up the sides in the acknowledge and going down his throat, it was red. He said he has never seen it before. He gave me antibiotics to give him, which I did for 1 week. The drooling stopped so I stopped the medicine. Now the drooling has started again and, when I checked his mouth just now, it is red again. Any suggestions? Thanks.