Re: Keeping a Vizsla's ears clean and healthy!
Well, being an orthopedic specialist doesn't mean they're good at every day things.
Anyways, V's are prone to yeast infections b/c their ear flaps keep the environment warm and moist, which is fertile breeding grounds for yeast..especially if yours swims. You can tell if it's a yeast b/c there is a copious amount of gooey brown gunk that seems to just keep coming and the smell, it's like bad cheese. Note that normal ear wax is brown, but it's usually dried, and not very much, and although it has a unique odor, it's not really gross.
The best prevention is to go in there with a dry cotton ball after bathing or swimming, and gently dry the ear out, don't enter the canal or his head, just get what you can see. The vet should have given you either ear wipes of liquid (Basically a diluted boric acid solution) which you could then use on a weekly basis to keep things clean.