My one bulldog is have trouble with one of her ears. She is scratching it a lot and it is read inside. I have been treating it with Surolan but this morning I noticed that now it is also red and she has scratched it on the outside of her ear. She does not have ear mites I had her checked. The Surolan has helped a little but does not seem to be clearing it up. Is there something else I can use to clear this up. Thanks for all your help.