We had a temperamental bun adopted from the shelter (our 1st adopted) who was very challenging in the early years. She would nip and bite when she smelled my clothing, socks, shoes after I returned from my rabbit socialization shift at the shelter. She was spayed at the shelter prior to us adopting. Likely an easter bunny unwanted. -- It took time to understand her disruption/aggravation factors or what caused her defensive behavior. -- I was ready to return her due to behavior, but I'm forever grateful I did not. Actually while describing her challenging aggression at times to a person at a pet supply store I was urged to buy a rabbit from her, or she had numerous rabbits she was trying to sell.
She became bonded to a n/male. As she aged she became one of the sweetest buns in our home, lavishing on kisses after her bondmate passed away.
Oh yah, she bit my nail and fingers and her reaction to scents on my hands, including rabbit urine from somebody she didn't know, caused blood to leak outta my fingers.
Takes time for hormones to dissipate and for rabbits to trust. Trust factor.
We've been thru this a lot considering the strays and unwanteds who are part of our family.
The temp move may have disrupted trust factors. Did you take her in for spay procedure, or the other humans where she was temp living.
Rabbits are typically sweet and kissy before hormones & puberty arrives. Yes, they'll have trust issues if mishandled or coming from an unpleasant background.
-- Please allow her to reestablish trust, is my suggestion. Yes it's very possible she got attached to a situation in the other home when you were at the hospital.
Compassion and patience in humans is in short supply these days. So-called mutts or mixed breeds or purebreds, they all have personalities and trust factors. Behaviors can be modified. Buns mellow as they age, as temperamental rabbits who came to us turned into cuddlers.