Well, i feed my cats wet food in the morning and they have a constant supply of dry food down 24 hours a day, plus fresh clean drinking water. Cats bodies dont store protein like ours do, they need to constant source. The only time my cats bother me for food is when it is breakfast time and they want the wet food or i'm sitting down for my dinner at which time you would think they had never been fed before. Apart from that they never bother me with "i'm hungry" meows. Try keeping dry down all day. If they are kittens, especially under 12 months then they do need to be fed several,k if not 3-4 times a day. Kittens burn off alot of energy and need to replace that protein often.