In the mean time there are several things you can do. Firstly - have a go at plucking the hairs that are coming out of your dog's ear canal if there are a few. Particularly the ones growing deep within the canal. Use either you fingers or some small forceps. You can also purchase some ear cleaning solution from you local pet store. There are several different brands here including epi-otic and oto-cleanse - I am not sure what sort of herbal mix you have. You need to follow the instructions here and be sure to give the entire ear canal a good massage after applying the solution (from the outside). Please see: http://hubpages.com/hub/Pet_Tips_for_Dog_Owners_-_How_to_Clean_Your_Dogs_Ears for more information on how to do this properly.
You should also have treated your boy using a good earmite product such as Advantage Multi - normal advantage will not kill these ear mites. These three things will definitely put you in good stead for your Vet visit and hopefully give your boy some temporary relief until an exact diagnosis can be made and some ear ointment prescribed.
Best of luck with your boy and please get to the Vet when you next can. Please keep me updated with your progress!!
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Dr M D Edwards