I have used ProPlan for 3 years with Cody. Never any ill effects. HOWEVER,
since the recall on all the foods I did switch to Canidae and Merrick brands.
I personally do not trust any food sold in stores anymore. But again I never had any problems with Cody on ProPlan. I honestly don't think a food can cause and ear infection though. Isn't it a type of bacteria that causes ear infections because they are treatable with antibiotics? But again I have NO idea cause I am not a VET
I also had no idea that ProPlan was not a good food until I found YT.