Hiya, congrats on your first bun

How old is Artemis? Is she spayed? If you are sure she is not uncomfortable (loud yelling, new animal smells, signs of illness like less appetite or less poop), it sounds to me like a hormonal driven aggressiveness.

Even after you get her spayed she could potentially act like this for a few months. It’s called a post spay craze. It’s your bun trying to get used to the hormones adjustments within her body. So she could get worse before she gets better. Patience is key.

Well, what’s important is that she’s getting there Not only you’ll prevent aggressive hormonal behaviour, but also spare her the chance to get uterine cancer!

In the meanwhile, since she can’t help it, please be careful and advice your siblings not to get their fingers sniffed by her (or not to pet her if she gets more nippy).

Glad she found a good home

I would also be slightly worried that she’s in pain, so she’s lashing out when she feels threatened. Is she eating and pooping normally?

I agree with the others, sounds like she’s hormonal. Congrats on your brand new teenage bunny! 

One thing I wanted to mention is, you might want to consider changing her routine or free roam area so that your younger siblings don’t hang out with her unsupervised. We’ve had several cases on the forum where someone had a bun that for seemingly no reason became aggressive. Children were part of the household, and naturally the parents insisted that they would never do anything to harm the rabbit, and in the end it turned out that the kids did handle the rabbit inappropriately, causing it to get defensive. I’m not at all blaming your siblings for this, as I said, I completely agree that this is most likely related to hormones. But since you have young kids in the house, I would still make sure they are always supervised when interacting with your bunny. Even when they know better, kids don’t always do what they’re supposed to, especially when no one is looking.  Rabbits are also notorious for getting underfoot/running right in front of someone walking, and can easily get stepped on. I’ve had a few close calls with my bun, and I like to think that I’m at least a little bit more coordinated than a 6 year old. And now with her being this hormone crazed, it wouldn’t take much for one of the kids to get hurt. She’s already drawn blood when she got you, and you’re her favorite person. I don’t know how your parents would react if one of the little ones got a nasty gash and had to have stitches. 

It’s great that you’re having her spayed, things should get much better then.