Hi Dena,
If it’s been a year since the last ear infection, I would be inclined to treat again. Ear canal removal is not something typically recommended if the ears can be improved. Oftentimes, there is an underlying cause such as allergies that could be addressed to prevent or limit ear infection recurrences. I would explore these alternatives before getting to the surgery possibility.
I would also recommend you to take a look at our video tutorial ‘How to Properly Clean a Dog’s Ear’ as it could help the ears to improve.
I hope this helps,
Dr. Ryan Llera