Brown discharge in Teddy’s ears may be ear mites or dirt. You need to observe whether Teddy scratches his ears frequently or shakes his head. If so, then it is ear mites. It is best to treat the dog immediately. To avoid aggravation of ear mites; if there is no ear itching and only a small amount of dirt, you only need to clean the dog's ear canal regularly.
Tip:
To treat ear mites, you can use pet-specific ear cleaning solution once a week and it will get better after a period of time.