I don't think they're completely unbondable either, but since the fight I have noticed a lot of aggression from Bugs towards Evie. He's never been any bit aggressive so this is a complete shock to me. I do think that if I took it very slow it may work eventually. I spent all day yesterday redoing the pen and my room and I love how the pen turned out. It's now 6ft by 4ft, 2×4 feet bigger than the last pen setup. Now they can actually run around when they're in the pen and I'm hoping it keeps them entertained. I was woken up 10 minutes ago to find Bugs in the pen attacking Evie. I think she was able to get away from him because she was in the box while he was standing next to a pile of her fur. I have 0 idea how he got in there so I have no idea how to fix it. There's nothing near the pen that he can jump up on. The hay box and litter is directly next to the pen and my organizer thing is next to that but he can't get from my organizer thing to the box and get in. I'm guessing he climbed it which is weird because he's never been a good climber and there's no way he jumped over it because he's not a great jumper either. I don't even recognize him anymore... I just asked him to show me how he got in and he got in the litterbox and put his paws on the pen bars. He definitely went in through the top.