My friend has two Newfoundlands who tended to get ear infections. She is very knowledgeable and particular when it comes to her animals. When I told her Django had an ear infection she made the following suggestion. Thought I'd pass it in in case it can help anyone :
"Zymox Otic....We haven't had any ear infections after we started using it and if their ears start to look red...we just give them a squirt and within a few days their ears are perfect. And you can buy without prescription. Amazon has it as well as Ebay....The one we use has Hydrocortisone as that's what the vet started us on...but looks like they sell one without the hydrocortisone.
Anyway, my vet was really impressed and calls it a miracle for ear infections. It has enzymes that eat the bacteria, wax etc. Noticed on the web...they don't want you to use it if you are using anything else in the ears...but once Django is done with this infection....you can use it to prevent others. When ours has an ear infection...we squirt them every other day...I think...it's been a long time, the don't really get them anymore. But...for maintenance....vet said to just squirt some in once a month. No mess...You don't have to clean it out. Our vet said the enzymes eat all the bad stuff...and then I guess they just dry up and go away...but it's easy."