Azoo is home!
Az is home! He's looking loads better than he did yesterday after a night and day getting fluids and all his medication via the drip. He wouldn't eat at the vet, but he is definitely hungry - has eaten a little chicken since he came home and so far has not brought it up.
Vet is pretty sure that it's not a virus, thinks he's probably eaten something horrible. My suspicions focus on decaying rabbit, which he loves. Phew, I am SO relieved. I really did not think he was coming home this time. He has rubbed his nose a bit bald and sore - from being in a crate, I think - but the rest of him is looking good!
Thank you all so much for the kind comments on my last post. I won't pretend I wasn't in a panic!