Hello all, I have a 5 1/2 month old GR pup that has been battling with an itchy ear and an ear infection (that was treated) for the last 2 1/2 months. Teddy came home to us from the breeder eating Costco brand Kirkland Signature puppy food. I am not a Costco member and since all my dogs have done well on Blue Buffalo I weaned him into BB off the Kirkland. He eats like it’s his last meal and his poops are good. Seems like not long after I switched him to BB I noticed him itching here and there so after keeping an eye on him I noticed he had some dryness in his left ear and took him to the vet. Vet put him on antibiotics and his left ear got better. I decided that maybe the BB was the culprit so based on the advice of this forum once the BB bag got low I weaned him on to Pro Plan Focus large breed. He still itches that ear off and on. All the foods he’s eaten in his young life have been a chicken protein and none of the foods have been grain free. I’m just not sure what to do, do I try a grain free food or do I try a different protein. I’m just not sure which way to go here. I think he’s too young for seasonable allergies and really suspect the food is the culprit. What’s weird is he only itches his left ear not both.