Shaking his head?

[Jango]

In the past three days Jango has started this shaking the head thing. At first I did not pay much attention to it but I noticed he does it quite often now. I took him to the vet and we checked his ears. No infection and no critters crawling around in there. He mentioned allergies. What kind of allergies may cause this. He has never had any reaction to his food or any treats. It has been raining a lot the past three days and before that it got up to 85 to 90 degrees for about 4 days. Can sudden weather changes cause this?

[lblax]

food allergies can develope any time even after years of eating the same foods with no problem

[Brooke&Ryan]

Julius did the slow shake of the head when he had a pretty yucky yeast infection in his ears. Took him to the vet & got him some antibiotic cream & he was as good as new.