He's back- and he was very hungry as he didn't eat the food provided (except some ham ).
It was a bleeding of the lung- but there was no tumor. It will have happened when he was too monkeyish- you should have seen him at Easter, jumping like a rubber ball and not like the elderly gentleman he is. The vet could see blood in his lung which will have to be absorbed- and in the mean time he cannot jump too much. We may take the cat tree down for this time.
Such a frail little bundle of energy!
The vet told him not to shock her anymore like this and I only hope he listens this time.