...and by 'feed him' I mean the nice packet of meat-in-gravy that he's eyeing up, not the huge bowl of dry food that's right in front of him 
I have 3 cats, but he's the oldest, he's 16 and a right old softie. All the cats have good-quality dry food available all the time (vet advice), but when dd gets home (around 3.15) they all have a pack of 'wet' food as a treat. Old Cat has decided that if he nags me enough I will feed him earlier. If I'm home at lunchtime he will start meowing piteously and looking at his dishes like I'm starving him. He will follow me round the house meowing!
I did try feeding them a bit earlier, but as soon as dd walked in he was around my legs again - because it was Food Time, obviously.
I end up either pushing him out the back door and locking the catflap, or shaking a newspaper at him all afternoon (he hates the sound).
Any ideas?