Agree with LBJ10, it would be good to confirm she is in fact spayed, just to make sure that isn’t contributing. Also, the timing of the spay would be good to know! If she was spayed right before you adopted her, it’s possible she is going through a “post-spay craze”, although that usually happens between 4-6 weeks, so it’s probably a little late for that.
Have there been any new pets, people, or smells in the house? I remember some members reporting their bun attacked them from something as simple as a new hand soap. Buns are very scent oriented, and especially in spring time they can be extra sensitive to new smells.
Could you also describe her set-up? I’m curious because there have been some cases where free-roam rabbits become “cage aggressive”, in that they get very territorial over the entire room they roam in. Sometimes in those cases it actually helps to have the bun penned part of the day in a space that’s only hers, so she doesn’t have to feel on guard all the time.
Regarding handling, while it is important to be able to pick up your bunny, in many cases “trying to get them used to it” is counter productive. Since you said you haven’t been focusing on that I don’t think that’s the issue here, but when a rabbit thinks it’s going to be picked up anytime you come near, it will learn to fear hands, which can then lead to aggression.
As far as toys for her, I think the cardboard empire sounds great haha. My buns also really like palm plates and anything made of willow. Cardboard cat scratchers are popular with the buns that like to dig or chew on flooring and baseboards. Phone books are also good for shredding if you can find them. Baby stacking cups are pretty popular as well if you load them up with her pellet ration.
Sorry if I missed something you already wrote!
In the meantime when you interact with her, wear leather gloves so she can’t hurt you. When she bites you, hold your ground and react calmly. You don’t want her to think the aggression has “worked”, but also don’t want her to become more afraid of you.
Here are some older threads where members had similar issues, there may be some good tips to try (you can search for more as well!):
psycho rabbit – i need advice!
Growls and attacks hands when we try to give treats-
LUNGING AT ME?!
Territorial behavior in SPAYED female
Do rabbits get overstimulated? Please help with an aggressive spayed doe.
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The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.