so my guinea pig has had dry ish skin on her right ear for a month or two and we don?t know if it?s a fungus or not. We?ve been treating it with a topical cream with clotrimazole in case it is fungus but it doesn?t seem to be doing much. It isn?t spreading and it?s only on one ear and just on the outside. She?s completely normal, eating, drinking, wheeking, etc. Im not sure what to do, should I take her to the vet? It also isn?t spreading to my other piggy. I?m thinking it could be dry skin as it is winter and the air in my room is really dry right now, but I?m not sure