http://www.yorkietalk.com/forums/gen...oppy-ears.html
I'm not sure if I linked the thread correctly above did but above is another thread you could read about floppy ears too. I had posted and added a pic on that thread about my daughter's purebred yorkie who is 3 years old and his ears never stood erect because he had a lot of hair on his ears. My daughter loved the way he looked with his ears down and didn't have the groomers trim the hair off of his ears. He has never had any issues with his ears.