Thank you for all the vibes for Starbuck and for asking after him today. I think the famous RU vibes are working as there is an improvement today.
He has spent most of the day in his litter tray again but did eat some pellets and hay this morning, he also took two fenugreek crunchies from me, and he took his Zantac, V8 juice and syringe feeds without too much fuss today. We put plenty of different types of hay and dried leaves out for him last night and today and most seem to have gone (although that could be Muesli).
We have just bought some evening pellets up for him and he came running over to greet us which I take as a great sign, and he nibbled a bit at some pellets. He seemed to be eating them much slower than Muesli and after a few mouthfuls had had enough and went back to the litter tray, so we put some pellets near him there and he is munching his way through those as we speak.
So hopefully he is on the mend, but not quite there yet. He hasn't done anywhere near as many poos as normal but there are some very small ones in the litter trays.
ETA: Forgot to say, that Starbuck is a dental bunny, and he often has to have his tear ducts flushed, its possible he will need these doing once we are sure the infection has cleared. He had his teeth checked though and they are fine at the moment.