You could have a bunny with rabbitude, and/or she could have learned that this behavior gets her her way. Some bunnies will become less territorial and less aggressive over the territory, but she could still be bossy about other things IF that is part of her nature. And so if that is the case and it’s not about her hormones, then we can try and figure her out and work with her so she is at least not attacking – which brings me to my next question – What do you mean by “attack” – Does she bite? is there something that usually gets her going? Like petting her on a particular area, or is it when you get near her she is just runs over and attacks.
I have had three VERY bossy bunnies, that were spayed/neutered prior to be getting them, and they used to bite,(Rucy was the worst – she didn’t give warning nips and bites, she lashed out if she felt you crossed her) but I was able to teach them to express their opinions in less aggressive ways. I don’t have problems with a bunny that wants to nudge my hand away, or grunt at me or even give me a little one-two punch, but if they bite, then I try to work with that behavior based on their reasoning for biting (current fear based, a learned behavior maybe originally based on fear, or just a bossy dominant)