I like to use this analogy about dog food-
Set a twinkie and an apple out.
Both will fill your belly and stave off the hunger, but which one is most beneficial?
(This is not directed at you personally, I've had this conversation with many many people and am just repeating what I usually say

)
The twinkie, actually two or three because that is how much it takes to fill you up, are full of junk, perservatives, fillers and things you can't even pronounce. Some of the ingredients...well... are just scary to think about.
That's your average run of the mill cheap junky food.
The apple.... usually just one will satisfy your body and there are so many good nutritional components in an apple (or other healthy fruit, the apple is just an example) that your body absorbs way more of it and there is nothing scary in an apple. (usually)
A little closer to a quality dog food product.
Taste buds aside (because a twinkie can be tasty, in a very artificial kind of way) which would you rather nourish your body with?
A quality pet food is quite a bit different than a junky one....not only for the ingredients and nutritional value, but you generally feed quite a bit less and because most of the ingredients are absorbed and utilized so much better, there is way less waste... or poop.
All the junk and fillers in a junky food go through a dog pretty fast and right out the back end and do nothing but take up space. Literally.
Ever try to potty train a puppy on a junky food? LOL
Switch the little pup over to a quality and house training generally goes better because there is less need to potty constantly.
I know, I know but you are saying... a "quality" dog food costs more.
Yes it does.
But, if you have to feed five cups of brand "Junk-O-Kibble" but only 1 to 2 cups of brand "Quality Kibble" which twenty pound bag of dog food will last longer?
In the end you end up paying about the same because you buy the quality food less often.
Anyway, that's my quicky answer about pet foods.
Cute dog by the way.