Well, I've been watching this since the beginning and I just wanted to pop in here too.

Here's a few observations:
Her MOM is who we should be bashing here. As a parent, she should have said "If you cannot work with Roxy, then what makes you think you can work with a rescue bunny with an unknown history?" Mom should have flatly refused a new bunny. Yet mom drove her to the rescue. How is that teaching her responisbility? How is that teaching her to respect her mother? I saw the out and out disprespect she has towards her mom's authority. I saw what she wrote about not caring what mom thinks, that its HER choice... well, unless I am mistaken, she's a young teenager (maybe 15?) and needs to grow up a lot. Mom has made her into a selfish little girl. Mom needs to be a parent instead of a friend who allows her daughter to follow every whim. We really can't blame Buttercup for something the mom allowed to happen.

Now, as for Buttercup, SHE needs to take responsibility for her actions with Roxy. She needs to stop and think WHY Roxy changed from a sweet bunny into an aggressive one. Maybe all those cothing changes for photoshoots made the bunny fear her? I have the feeling Roxy gave her PLENTY of warnings before it got to the point of aggression, and she ignored the warnings just like she ignored the good advice everyone posted. Its sad that she only wants a perfect bunny but will not follow good advice on how to work with the bunny who just a few months ago WAS the perfect bunny.

All that said, I know nothing of bunnies. I see them hop across the yard and the cats meow to them. But using what I know about basic animal behavior (it almost assuredly can also be applied to bunnies) a domesticated, loving bunny won't turn aggressive over night. It needs weeks of exhibiting a fear behavior before it resorts to aggression to get its fear across to you.

I hope I am wrong.... and if not, I hope she learns from the mistakes she made with Roxy.