I told the vet that she has always been a really small cat (she's 14 but still looks like a kitten size wise) and they have their food down all the time and just eat it as and when they are hungry. Because I work full time I always leave them a bowl of dry food down and just given them whiskers pouches when I get home, which they dont always eat, they just nibble at it and then leave it and I end up throwing most of it away.) I give them a tin of tuna every now and then as well. Pehaps I should try them on some sardines as they are high in calories.