He is fine, he is eating, peeing and pooping now. Shortly after I wrote this I realized he had peed a bunch in his pan after the accident on my lap… Since then, he is eating lots of hay, drinking water and pooing bucketloads. I should have double-checked, but he had been sitting on the pan constantly at the time!
I have encountered GI stasis before and know it is very serious. I think he was just stressed, but I am VERY relieved, he is doing very well now. He has been Thank you for your concern and advice, I was very close to taking him in for sure!
I have moved them both to be in long pens next to each other, with food near each other and litter on opposite ends. So far so good. I don’t know when I will try an introduction again, but for now they both seem happy to be next to each other. (they are just far enough apart that they can’t bite through they bars.
I have also read that swapping pens every other day helps them get used to smells, and not be territorial about either space. I may try this.
Any other advice on the future for them? I know bonding can take a long time, but what has your experience been?
PS. From their interaction thus far, my rabbit seems unsure about the new guy, but very curious and friendly. He is settling and very good with me, but I think being bullied in the past has caused him to be defensive/aggressive towards her. In the previous(unwise I think) setup, he tried to attack her a few times but she did not respond aggressively.