A. The main two options remaining are fleas and allergies, if you are treating for fleas regularly, then allergies makes more sense.
It's difficult to diagnose and treat allergies, but usually the first thing to do is put your dog on hypoallergenic food and keep it on this food only for 2 months.
If after that time there is no improvement whatsoever then an allergy test should be performed.
The last resort is treating the allergies with medications for life - Atopica or Apoquel.
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