My 14 month old male eats 1/4 cup morning and night. He weighs 6 pounds. We rotate between Innova and Canidae. He has to have a spoonful of something "tasty" mixed in with the dogfood to make him eat the dry food. I rotate with chicken, turkey, cottage cheese, tuna, tuna water, ground beef, just whatever I have. It's a very tiny amount but without the people food mixed in, he won't eat plain dry food.
He also usually gets about two treats a day.