ohhhh, I remember Maryann and Dono’s bonding. Mark finally took them to SaveABunny I think and let them finish the bonding. Sometimes it helps when the bonder isn’t the bunny slave.
I wouldn’t give up on giving them interaction/bonding sessions, just to help them get along in their common play area, but if it comes down to separate condos in the end, I wouldn’t worry too much.
I tried bonding the younger Charlie with my older trio and it was a disaster. What I’ve wound up with is the room split in two with separate ‘out’ times. After Pringles, Daisy (the one that absolutely hates Charlie) and little Toby have their time, I chase Daisy back in and let Charlie out. He and Pringles (my lovely diva) have a great time playing together and Charlie doesn’t bother Toby.
I can tell Daisy doesn’t like it, but he’s not aggressive towards Pringles when she comes back, just grooms her for an hour to get Charlies scent off…lol. Outside of the poo wars up and down the common fence, there’s no fighting through the grids, just a lot of deliberate ignoring.

This started out as Pringles laying next to Charlie (right) through the grids. The dutchie Daisy comes along and lays in front of Pringles and very, very gradually scoots her back as he grooms and snuggles until he’s got himself in between them….lol You can see where the towel she’s on has been moved back, it usually overlaps the other one since Daisy insists on laying down a PP boundary.
Buns are so funny.