It sounds very much like the same problem that Wesley and Aimee have had with their ears lately, and I have always uses thornit. First thing i noticed about Wesley was he was rubbing his ear on the carpet and that was the first time i had noticed him doing it. I was shocked to death when i saw his ear, it was in a mess and had been weeping for a day or two. It couldn't been longer than that as he gets a good comb through every other day and I would have noticed it. His ear feathering had gone like cardboard from where it had been weeping so much.
Anyway, I cleaned it up, dried it and applied thornit. As the ear was so weepy the thornit made it worse so off to the vets we went. He was put on a course of antibiotics and was told to clean his ear with novosan, an antiseptic wash. A week later, his ear was worse and was highly inflammed. The vet checked for grass seed at the first visit, so he had another anti-inflammatory injection and was given antibiotic drops. Another week later, it was still not better but it had improved a lot and was told to carry on with the drops for another week. Well it appeared to heal up completely.....or so I thought.
A month later, at the Cocker Champ show, Wesley was going mad in his cage and I noticed he was pawing at his ear again. Luckily the vet that was doing the eye testing had a quick look for me and said it looked inflammed. The following Monday, off we went to the vets again, this time Aimee had a bad ear too. We saw a different vet and she gave Wesley and anti-inflammatory injection, and antibiotic injection, tablets for ten days and told me to use the antiobiotic drops. Luckily this knocked the infection on the head for Wesley.
However, Aimee was a different matter, as she was heavily pregnant with only a week to go, she could not have any injections or antibiotics. I was told to clean her ears out twice a day with the antisceptic wash and after a week to put some antibiotic drops in twice a day which I did.
What I can't understand is why they both got ear infections at the same time. Both of their ears were in a terrible state in such a short space of time. The vet said is that they are most likely to have picked up an allergy to something, but to what we don't know. Their diet had not been changed. Their bedding was always washed with the same washing powder, nothing had changed. I have always kept their ears short underneath so that air can circulate around them. Could it have been the weather that caused this? Neither dogs have had any ear trouble until this summer.
Anyway, I hope all the cockers that currently have ear infections, get well soon!
Sandie, Aimee and Wesley xx