Nova scotia duck tolling retrievers?

Tollers have a very high energy level, and that can affect their personality. Once they are properly trained and exercised, they are great dogs. But if they aren't they will be destructive and dominant. If your aunt hasn't noticed those behaviors in her dog, then whatever she is doing, she's doing it right. If you're gonna take her dog, ask her exactly what she does with the dog and keep doing it.