I am also dealing with a sluggish recovery from stasis. Toffee came here from a rescue a couple of years ago and I haven't experienced it in him before, my other bunnies have normally recovered quite quickly. Toffee made a good recovery over about 34 hours, eating, pooing and binkying on Tuesday then by Wednesday morning that had unravelled. No poo or urine from him all day and we went back the vet who said he was gurgling, and his temperature was on the low side but he was only moderately ill and I could go on doing what I'm doing with a view to seeing a specialist if it's ongoing or reoccuring. He did give him fluids and opioids though (he said Toffee was in pain, the metacam wasn't doing enough to cover it) which enabled us to sleep through the night. Today: six poos so far, reasonably large and healthy looking. No pellets, no hay but he has eaten some basil and parsley. When I syringe feed him, he doesn't chew and swallow it, it sits in his mouth so I can't put much in at a time (it just starts coming out again). A few times I've seen him wake up, realise he has recovery food in his mouth and chew on it, other times he just spits it out. He is seven years old. His teeth are okay, no sign of arthritis (unlike my other one). No idea what his diet was like before he came here though.
I'm glad Andi is feeling better.