I has to switch foods, as one of mine needed Gluten free food. I tried the Blue Buffalo (after trying a few other, they didn't like), and to my surprise, they liked it, but then, I found out that the BB was lasted much longer than the MM. Turns out that not only is it better for them, but because it is more filling, they eat less and it last longer

So even though BB cost more, I'm actually spending LESS on the food.
Like you you snack, if you eat something healthy, you don't eat as much to be filled, but if you eat chips, you eat, and eat, and eat.