My cat is about 10-11 months old, and is a skinny cat. Though lately he has lost some weight, so much that now when my wife or me pick him up we can feel his bones. Over the past week he has gone from hardly eating food to not eating anything at all. We changed his food with a different brand and he still refused it. Though my wife tells me he is still drinking water throughout the day. Today his ears and nose felt cold. His eyes also seemed more glassier than our other cat. Currently we've got him wrapped up in a blanket and he's sleeping. He seems more weak than usual. Anyone have any guess as to whats up with him?