Thanks for all your support for Squirt (and me!)
Squirt is back again from a day at the vets. His temp was slightly low this morning so he's still not right.
He has the wobbles on his back legs and occasional tremor which may be a result of the Parvo, which once again is the suspected cause.
Vet say he is eating fine and bright , that I should continue giving him fluids every so often and only bring him in if worried. Vet said they gave him no fluids today so aren't really doing anything (I suspect he will miss the attention). He is happily eating wet food there though doesn't seem too keen here even though he has been offered the food they provided (not to mention the turkey from Sainsbury's carvery picked up this afternoon!).
They are concerned that having picked up he seems to have reach a plateau. So they are suspicious of something else going on as well. They suggest if all is the same next week it might be worth taking some bloods.
I do look forward to having a houseful of healthy cats - a sentiment that seems very prevalent with all the rescues that visit this site!