How much dry dog food should a 15 lb dog eat?

If your dog food has real meat in it and not meat by-products corn wheat or soy (which are all fillers) than one to 1 3/4 cups a day.If your dog fog does have meat by-products corn and other fillers than you will need to feed him/her 2 to 3 cups a day and maybe a little more.The better the food the less you need to feed.