One of my foster pit bulls that I found a wonderful home for has an issue. I just got here to my friend's house, where Buster is, and I noticed that one his ears was warm to the touch, and looked inside it and found reddish/purple skin that was flaky, and my friend says there is no smell. It must have happened today, since she regularly checks his ears and didn't see it until just now. Buster's ear is a little sensitive, but he doesn't yelp - nor is he scratching at it. Anyone have any idea about what may be going on? Please let me know - thank you.