Hi there! Congrats on the new bunny! It sounds like your girl is just being territorial, which is normal. Rabbits, especially females, need a place they can call their own and can get a bit aggressive if they feel their space is being violated. The best thing to do is to try to clean her cage etc. when she’s out exploring or playing to minimize aggressive behavior, and getting her fixed when she reaches the appropriate age will also help. I also suggest, though, not giving her too much free roaming space until she’s proved she is litter trained (assuming you want her to be; there’s lots of info on here about how to go about accomplishing that). Another way to minimize aggression in my experience is to minimize the number of times you pick her up (if she doesn’t like being picked up, which the very large majority of rabbits find stressful) to develop a trusting relationship instead of one built on dominance and fear. Anyway, that’s super simplified but there are tons of other threads on here about the specifics. Best of luck and welcome to the club!

Yup. Some buns are very territorial and that’s just the way they are. I think you can try putting on a glove and not jumping away when she attacks. Pretty sure I’ve read that here. It kind-of worked for my bun, though it never totally went away until he was put in a huge pen with his new girlfriend and he’s been so much better ever since. Enjoy! It doesn’t mean she will be a miserable pet. But she may remain territorial in her cage.