Sad news I am sorry to say.
After thinking long and hard, I decided I could not keep Jinty going any longer. Although not as bad as the first time, in that she was not blind, her eyes not rolling back etc. she was still down flat out, and rigid, and did not appear to be making progress - ie not trying to get up. She was still eating and drinking, and enjoying the leaves I collected for her.
Its not an easy decision to make, but even had I got her up on her feet again, there is no saying whatever it was would come back.
Such a shame though, but I think I made the right decision, as I had given her every chance to get better.