Hermione tried to remember if they bred true, but she really didn't know.  She'd only read about them when researching creature rights, and that subject had been less interesting to her since it had become fraught with the rage that she was the creature in question.  Laws were sketchy at best regarding her rights.  If Draco had decided to keep her as a pet, she probably wouldn't have had any legal recourse.  "I don't know," she said.  