Last night Bruin had the WORST yeast smell. We were sitting there eating supper and all of the sudden my boyfriend and I look at each other and say 'ugh, whats that smell?'....surprise surprise, its Bruin. Now usually it's a fart from Bruin or Lilly that sends my boyfriend out of the room, but it was yeast in his ears. So I've been trying to think what the heck could have brought that on all of the sudden. So I'm reading this article http://www.thewholedog.org/ArtYeast.html and BING the lightbulb goes off. Tuesday night I gave them their monthly heartworm and Wednesday Bruin has horrible yeast in his ears. I didn't think "side effects" could happen that fast! Anyone else experience this with heartworm meds?