My one year old cat Jacques has been eating hardly anything for the past few weeks. He used to scarf down his food along with his brothers but now he'll come running when I put down food and then just walk away. I haven't changed the brand or types of food that I've been feeding them in a long time. He seems to take only a few bites and then leaves the rest. I have the them all on a routine also for when I feed them and everytime I come to feed them his bowl is always almost as full as it was when I left. I know I'm not overfeeding them. He still plays fine but he also seems ultra jumpy which isn't really like him either. I don't know whether its something to be worried about or not. Anyone have any ideas?!