Oh my goodness, poor Rolo
! What did the allergy testing say that he was allergic to, specifically? How old is he now?
At what age did his issues start? Did his issues start after receiving a kennel cough (bordatella) vaccine, btw?
When they culture his ear/throat, what bacteria/fungus grows out in culture?
I have not heard of that supplement..but sure hope you get answers for your kiddo.