flys eating dogs ears

I have two dogs one of them continuely gets yeast infection in her ears eyes and below. Recently the flys have been attacking her ears now they have gone after the other dogs ears too. They are bleeding and crusting over. I have tried flys off spray and vasiline to coat the ears . not working? any suggestions why they are eating there ears?

[Fourpaws]

Have you tried keeping them inside until the infection goes away? Just let them out to go potty. That can't feel good on their ears.

[April2]

Have you tried googling it or asking breeders or your vet what they use? I remember years ago I had a friend who had Siberian Huskies she was breeding and she found something that she put on their ears for the same problem. I'm sorry, I can't remember what it was! :( She was pretty knowledgeable about stuff though and even administered her own dog's vaccinations by ordering them online. Sorry, I can't remember what she used but it seemed to work. I'd ask your vet first and then go to some sites of other breeders and ask them. I know that's got to be miserable for the poor dogs. At least we're getting into fall and winter now so it shouldn't be so bad. Good luck. I hope you find something soon!
Have they been seen by your vet for the yeast infection and fly bites?