I have a Pembroke Welsh Corgi that just turned two. Almost since she was a puppy she shakes her head alot and scratches her ear. We have taken her to three different vets for the problem and they have examined her ears and see no infection or buildup. So they say it is probably an allergy. They have put her on antihistamines but the problem persists. Anyone else have this problem? What did you do for your corgi?