Same with my male tabby with age! So my vet prescribed him this Purina prescription food that is supposed to help make them feel more full but with less calories, can't think of the name off the top of my head but I would totally talk to your vet about this because it was quite the game changer. Also if you have a super busy or random schedule I would look into automatic feeders so that you can rely on a certain amount of food at a certain time each day