Congratulations on your buns being bonded, they look so cuddle laying together.
Our 4 are now bonded and living in the same x pens (we have 2 connected together for extra space) The only conflict we have is over one of the boxes placed in their house, The younger buns seens to want to “invade” it whenever Clyde tries to hide from the women. Thankfully he ow has his very own upside down laundry hamper with the side cut off it. He lets the girls come for a visit but it’s generally a short one haha.
3 weeks isnt long for bonding, but I’m so happy to hear it’s all going well for you. As for bonding a 3rd single bun I’m really not sure how you would go about it since ours were 2 separate pairs of bonded buns we were trying to make a 4some. Would following a similar process that you did with the previous bonding work? We found that allowing them supervised time out together in a neutral area worked wonders. Just wish we had of tried that first haha.