A few weeks ago we adopted Frankie and bought the food that the Humane Society had been feeding him because we didn't want to change anything right away. That bag said to feed one cup a day for a 10 pound cat. Yesterday I bought Inova for adult cats and am mixing it in to start switching him over to a better food. The Inova says to feed 2/3 cup a day for an active 10 pound cat. We gave him 1/3 cup this morning and it was almost gone by the time we left for work. Is 2/3 cup of dry Inova enough for him? We give him Greenie treats and a scoop of wet food in the evening too. Just seems like such a small amount of food. I don't want him to get over weight though.