Hi, I'm a new member, but I have been reading a lot of the forums. My white Shih-Tzu/Bischon has terrible tear stains. I had given him Angel Eyes, but he got worse. He also has reddish brown stains around his mouth and around his butt. (He does some serious butt licking.) I stopped the Angel Eyes when i read that it contained an antibiotic. After reading some of the forums, I'm, beginning to think it is a yeast overgrowth. I've started putting apple cider vinegar in his water, and I'm in the process of changing his food to a high grade gluten free diet. I wipe his eyes on a regular basis every day. Is the butt licking because of the yeast overgrowth? Will it stop and return to just a normal amount of butt licking? He wakes us up in the middle of the night with loud licking and it's really kind of gross.