I just switched butler's food to fromm surf and turf. the crude protein is 30% (10% more than the last food) and the bag recommends 2.25 cups i believe. It also says "for the average active dog" which butler is not. he walks a mile 2-3 times a week, but is pretty lazy besides that so i figure i should feed him 1.5-1.75 cups per day. i feel bad cause he acts like he is still hungry, but since the protein is so high and he is not active, too much protein can be bad for his liver (or kidneys, i can't remember). also, my school of thought is that dog food companies want to sell dog food, so i think it may be likely that they overstate feeding amounts. i could be wrong though with these nicer brands like fromm, nature's variety, etc..