Floppy ear dogs are prone to ear / yeast infection due to no air circulation in their ears. Dogs with stand up ears are less likely to have ear problems unless they have a lot of hair inside the ears that prevent air circulation. My guy gets a lot of hair growth inside his ears which causes ear infections,he fights the groomer so I take him to my vet and have the techs do it. He is good for 9 months or more. As for your aunts dog, she was probably already getting an infection before they took out the hair. Clean hairless ears = healthy ears.
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