Unfortunately the situation today does not look so good. I slept on the camp bed with Revel last night and he was up and down quite a bit. I took him out a few times to see if he needed to go but he just stood. This morning he was pretty tired and slept on in his basket until quite late. When he woke he was sick, mainly bile and water but I took him outside again afterwards and he had another wee. I decided that if it was nausea caused by the vestibular disease then an injection was in order to combat it as he still showed no signs of wanting to eat. I took him to the vets and he walked quite well from the car park to the surgery. The vet (a different one to our previous vet who has sadly now retired) didn't want to confirm or deny the vestibular, as Revel didn't have all of the signs but agreed the best course of action was to combat the vomiting so gave the injection. Revel walked out again and was interested in his surroundings and the other dog in there which I took as a good sign. All he wanted to do when he got home was sleep, although he woke up about lunch time and drank some water, had another wee and moved about a bit. I managed to get him to eat a tiny bit of the prescription Royal Canin Gastro food which I got a tin of to stimulate his appetite, but since then he hasn't wanted to eat any more and just wants to sleep again.
I'm really not sure now which way this is going to go. I've always said when Revel doesn't want to eat then that's going to be a strong indicator, but if it's just nausea the injection should work. He looks very old and tired right now, but not in any apparent pain or distress and the vet confirmed that he was well hydrated and his heart and reflexes were normal. He's still fighting.