My last cocker Milo (see avatar) had very narrow ear canals, and after an ear mite episode he went gradually deaf. His eardrums disintegrated aged about nine. He became prone to ear infections, and oblation was discussed. It's big operation, if you have Googled it you will see what a nasty procedure it is. My vet and I agreed to manage the condition with a rigorous regime of drops and special,ear cleaner, drops every day, the cleaner every other day, and he had his ears flushed out under GA maybe four or five times. A friend of mine had her dog done, and the dog was never the same again and she wishes she had not had it done. We managed Milo's condition until he died aged 15, from something else, and I don't regret not having the procedure.
However, it is your decision, I would say do some research, maybe get a second opinion, particularly as your dog is young. I am only speaking as a lay person, so don't want to put you off. Sorry I can’t be of more help. Good luck with whatever you decide, and all the best to Lily.
Lesley and Dylan
