Welcome to PT! How old is your cat? My Romeo would like to eat all day if he could, but I won't let him. He acts like he is always hungry, but I don't give him food everytime he wants it. If he begs for food, i will not give him any, and soon he realizes he will not get a treat, he goes off to play. Romeo is 7 months old.
Your kitty may be wanting to eat, out of habit, like my Romeo does, but if not, he may have worms. I agree to have him checked by the vet.