My dog seems to have smelly ears how to treat them please advice.
See a vet to determine the cause
First, see a vet to find out what is causing the problem.
Second, try switching (gradually!) to a grain-free food.
Jackie, Champ, and Buddy
If the vet diagnoses ear mites then once that they have been treated, you can avoid returns to the vet by cleaning them with proprietary cleaning solutions. It all depends on the diagnosis so see the vet and then come back to talk about it.
I would make a vet appt to find out the cause of the ear problem.
I agree vet.
Here in N.Z."cure" in that term means to preserve them so I did wonder what you were going to do with your dogs ears.