I wait until 8 weeks. Even though most of mine are weaned by 5 or 6 weeks, they still eat their mom's cecotropes and need that for good gut bacteria. They also learn behaviors by watching her. I sell bunnies as pets though, so I'm going for temperament. Even at 8 weeks often the babies are not ready to leave mama and the herd. At 9 or 10 weeks they are almost always sweet and friendly and ready to go to their new home super socialized. That's just my experience tho.