We have the opposite problem.

Our 2 year old male barely eats 1 pouch a day. We always give him a small bowl of dried with his wet but he doesn't finish that either; probably eats the equivalent of 1 bowl of dried a day.

He is certainly not underweight; if anything he is probably a bit overweight (@5kg - he's a moggie but we think he has some bengal or the like in him as he has very big paws and a big frame) but he is an indoor cat so doesn't get so much exercise.

I am conscious that the food we give him is not the best by any means (Felix marinades) but he likes it which is the main thing. We've tried him on practically everything else but this is the one he prefers. I'm pretty sure these type of foods (Felix, Whiskas) contain a lot of cereal and not much actual meat. Could this be why he doesn't eat too much as the cereal is bulking him out?