Yeah, I read that cats often don't show that they r not well until last minute that is why in many overseas websites, many vets say diorang very takut dgn. cats: they often go downhill very fast. So they cannot just think that if a cat acts normal and active, that means they are fine. They think it has to do with in the wild where they cannot show they r ill or hurt, takut predators know they are weak and easy kill. And when injured, or hurt, really tak tahan, they will hide. So, a hiding cat is normally a sick or injured cat. So sorry, Koben, such a pretty little baby!