My oldest kitty Asher is 5 1/2 years ol and Jack is just over a year. Asher is my big boy (not fat or overweight at all, just a large cat) and weighs about 16lbs. Jack is smaller and weighs about 10 or 11 lbs. I just got them switched over to an all wet food diet and have been buying Fancy Feast wet food for them. It comes in 3oz cans and I feed my boys twice a day...once in the morning and once in the evening. I have been letting them share a can when I feed them (share a can in AM and share a can in PM). They get fed in separate bowls. I give Asher a bit more than Jack. Asher wolfs down the food and Jack takes forever to eat. Often times Jack will only eat half of what I give him before he walks away. I often have to coax him to eat more, but he never finishes it all. If I'm not careful Asher will finish it off. Anyway, am I feeding my boys enough/too much? I don't know how to figure out how much to feed each cat. Thanks!