How long did you bond and prebond for and what kind of bonding and prebonding? Because if you’ve only had her for 2 months that is not a long time at all. Did you give her time to settle in and adjust? The first month or two is scary for a new bun in their new home and they really need that time to adjust to their surroundings and she can get very stressed from all the new changes at once. And did you build this new enclosure as a last ditch effort? Because just putting them into it isn’t going to just make them bond. You should keep them separate, let her actually adjust to life without attempting a bond, do a bunch of prebonding, and then you can begin bonding them again. It’s also important to know if the female is spayed. If she is not you need to stop putting them together because she is hormonal and will act as such. Is he neutered? If neither are fixed you need to keep them separated completely until 1-2 months after the operations.