Leigh, have you tried any holistic practioners for animals? I dont know where 
you live, but  there must be a web site that can give suggestions. I have a 
beagle that had chronic ear infections. We tried the antibiotic regime for a 
year and she just kept getting it back along with fungus. I finally went to Pet 
Mart and got product that had some herbs that fight infection and fungus. I 
only have to use it about twice a year now. It has completly cured her. Are you 
sure that it is infection and not a tumor? This can be caused from the water 
supply according to a vet that my brother went to when two of his hounds got 
mouth cancer.
       
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