Thanks so much for the replies! I had an appointment for him today, but the hurricane got in the way. I'm calling again tomorrow. I've been cleaning his ears daily with cleaner from my vet. I notice that when it rains, his paws get wet, I guess yeast builds up, then he spreads it elsewhere. I have been hypervigilant about drying his paws when he comes in, and it really makes a difference. Still going to the vet, tho. thanks!