Sorry this is so long, but I wanted to include all information that seems relevant
I have had Foucault for 3 years and Frances for about 3 months. Even though Fou was the first bunny, Frances is way more territorial and engages in more marking behaviors as well as aggression. Since Frances came home, the two have had side-by-side x pens in my living room, as well as sharing the living room as a play/exercise area. Frances is a bit of an escape artist, and she has gotten after Fou a few times, which mostly consists of her chasing him around the living room and then stopping when she sees me approach. The two of them do interact through the bars of their pens, usually if Fou is out he will approach her and she’ll lunge/grunt and then allow him to groom her, and if Frances is out she’ll just hop up and flop next to Fou’s pen. I tried to start bonding about a month or so ago, with the two of them and me in an x pen in a semi-neutral area (don’t have any true neutral spaces atm, working on clearing and cleaning my kitchen so that I can try in there instead) and they would chill next to each other for as long as I was petting both of them. If I stopped petting Fou, he would hop away, and if I stopped petting Frances she would lunge/grunt/nip at Fou. I had them next to each other, petting both of them, for I think up to an hour. I halted this because Frances started getting out of her x pen and attacked Fou again and I wanted to ensure that I could keep her in her pen and start from the beginning so there wouldn’t be bad blood between them.
For the past two weeks I have been switching them between pens every day. Everything I have read about pre-bonding says that when they stop being bothered by being in the other rabbit’s space they are ready for bonding, and I have seen a decrease in poop outside the litterbox, but I am not sure if they are both really ready. Frances will still lunge and grunt at Fou if he hops up to her–is there anything I can do to decrease this behavior? Would more pre-bonding help with this, or should I try stress bonding?
When I start bonding them again I think I’ll try in the kitchen because they don’t go in there regularly. I’ve seen conflicting information on how much space to give when starting to bond, would it be better to set up an xpen in the kitchen, or should I give them the whole room (approx. 13×6 ft)? To ensure that the kitchen is neutral do I just need to clean the floor with a vinegar solution or do I need to do something more?
Any additional tips would be very, very welcome!