I'm pretty sure they do. Poor Bijou; her trademark Poodlish ear-hair had very quickly become a single, thick dread-lock on each side of her head. To give her some relief, I had to get the clippers and get those matted pieces off. To do that, however, meant that the beautiful, soft ears had to go away.
The kids couldn't believe how tiny her ears actually are, underneath all that long hair. She certainly doesn't look much like a poodle now, does she? Poor thing.