Post-spay craze is natural, as her hormones are going through much needed regulation. Territorial, mating, and destructive behaviors can amplify during this time. It is the same for post-neuters as well. You want to differentiate that the behavior is not due to her being in pain though. Any odd topical characteristics at the spay site or changes in appetite/activity level? Also poops— anything abnormal (appearance/frequency)?
The hand attack could be a result of how she views your hand. If it’s directly in front of her or she does not notice it in her periphery, she may lunge out of defense. Rabbits have a good panoramic field of vision, but they have a big blind spot in front of their nose, and they are quite tunnel visioned, so even when you’re at their side, if they aren’t consciously focused on you, they may not realize you’re there.
Another consideration is she not knowing your hand is your hand. Humans are very large, and it can be very difficult for a rabbit to grasp that your big toe to your pinky to your nose is all . Getting down on her level before reaching in, and just making sure she reacts as a sign of “ah, I see you” may be a good measure before reaching in to do things.
The default is rabbits do not like being picked up. They’re prey animals, so programmed within them is “Being lifted up off the ground = A predatory animal just picked me up and is about to eat me”. There are rabbits that will tolerate being picked up and held, as there are exceptions to everything, but generally speaking, everyone goes by the advice to pick up your pet rabbit as least as possible, unless necessary for safety, medical reasons, or transport.
For the picking up (not liking it) > being held (teeth chattering contentment) > putting down (not liking it), I use a sky diving metaphor, based on my observations with Wick. If someone is really terrified of skydiving, they will fight before getting pushed off the plane (fighting to get picked up). Once you’re in the sky (being held), someone hands you a gift that you always wanted so you’re happy (being pet while held). Then you land on the ground and remember, oh wait, you pushed me out of the plane in the first place (being disgruntled after being put down). So in short, you may bond better and sustain a better relationship if you keep petting to the ground level, rather than when held, but there are exceptions of course. It’s just something to keep in mind I pick up with multiple times daily for many reasons, so I cannot rightfully denounce picking up rabbits at all. I think this is the reaction she’s giving you with being picked up, but I can’t find a clear statement in your post (not necessarily your fault; I’m quite tired right now)
A show rabbit is one that would be trained and highly exposed to getting maneuvered, posed, asked to stand still for periods of time, and poked and prodded by judges. If the rabbit is an ex-show rabbit, it may be that way because she was intolerant of that life, which is natural for rabbits. A rabbit that stays still and lets things invade their space is dead in less than a minute in the wild. Yikes! Because she may have a history of hands approaching her to test fur texture, spine posture, head shape, hip shape, etc.. I can understand why she’d be defensive towards hands. That association may need to be broken, so try just presenting your hand to her and letting her investigate that it won’t always go after her. At times when you’re cuddling, put your hand right by her so she’s exposed to its presence more and the fact that the presence is not a danger. When you’re petting a rabbit, it doesn’t really see your hand since it’s above them, so being afraid of a hand approach doesn’t seem too unusual, even for a rabbit that likes being pet.
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.