Now, Roxane is really back to her old self:

• Stealing my food
• Jumping after my socks when I put them on
• Playing rough, including biting my hands
• Jumping and dancing all over the place
• Having fun with the others

What I've noticed while she's been weak is that she's now switched to more keeping together (at least when they sleep) with Carmen, who now is more her size. Carmen has also been playing some with her, so I guess the positive effect of getting one more ferret wasn't just that Natasja has gotten activated, just seeing Carmen play has been worth all the trouble Roxane has been!