Awwww Penelope, she’s so cute and angry!
My recent foster-fail Bonnie was the same way. She was very cage aggressive after being in the shelter for 3 years, poor thing.
What I did with her was I made sure she had her own space (a pen) that I didn’t mess with. For the first week or so, I only feed her, but didn’t try to pet her or anything. I cleaned her box a bit less that normal just so she could settle in.
Once she was comfortable enough to come out into the room to exercise (this took a couple weeks), I was sure to do her pen and box cleaning while she was not in the pen. I still didn’t try to pet her or anything, I just hung out in the same room with her and ignored her.
After a few more weeks, she would relax on the ground outside her pen near me, and then prob a week later she accepted some nose rubs. Every bunny has a different timeline, so I would say for Penelope, just give her space and don’t mess with her for now. Try not to do anything in her space while she’s in it if you can, or keep it minimal. She has gone through some trauma, but the more she realizes you aren’t going to grab her or hurt her, the more comfortable she will get.
Once she is more comfortable in general, you can also add some hand feeding of greens. Doing this through the fence bars can also help them feel safer and start to build some trust (because they feel protected by the barrier).
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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.