Looking for some advice please if anyone could possibly help with a very unwell rabbit who is refusing to eat. He was eating on Sunday night but yesterday morning was quite quiet and didn't jump to his food as normal - although he sometimes is quite sleepy in the mornings so we weren't too worried. We came in at night to see he was sitting unusually quietly and hadn't eaten all day, so took him straight to vet, who gave him an injection and Fibreplex to try to get his gut moving and sent us home with him - we gave him Fibreplex again last night and this morning. Last night he was hopping around the living room seeming ok at times but still acting a bit odd at others, sitting facing the wall instead of lying flopped out like usual, and this morning he hadn't eaten a thing and was very weak and unresponsive, and felt very cold - he also seemed quite uncoordinated and confused. We took him back in, and the vet has said he thinks he has begun to shut down and a recovery is unlikely - he is keeping him in today and will try to get him stimulated and going again. I know I'm clutching at straws here but we are beside ourselves - he's 5 years old and has always been generally healthy, and if there's absolutely anything us or the vet are not thinking of or don't know of to try I want to try for him.
(In case it's of value, although I'm not sure, he was in the vets just over a month ago after we were worried that he had stopped eating cecotropes or cleaning himself underneath, and it was believed his teeth were bothering him slightly when he moved at the angles needed for that, so they were done (although the vet did say they weren't that bad so any pain would be slight) - he had been a bit better at cleaning after that but not completely, although we guessed it might be that it would take a little time for him to realise the pain was not there. He has also had a few changes in character in the last month or two, but nothing bad, just noticably more affectionate and looking for strokes but has seemed very happy).
Thank you so much for any help.
(In case it's of value, although I'm not sure, he was in the vets just over a month ago after we were worried that he had stopped eating cecotropes or cleaning himself underneath, and it was believed his teeth were bothering him slightly when he moved at the angles needed for that, so they were done (although the vet did say they weren't that bad so any pain would be slight) - he had been a bit better at cleaning after that but not completely, although we guessed it might be that it would take a little time for him to realise the pain was not there. He has also had a few changes in character in the last month or two, but nothing bad, just noticably more affectionate and looking for strokes but has seemed very happy).
Thank you so much for any help.