If you look at Core Reduced Fat Dry, there’s approx 37% protein and 11% fat so approx 30% of its calories are from fat versus protein.
Then look at Hill’s B/D Dry with approx 19% protein and 16% fat with a resulting approx 83% of the calories coming from fat vs protein.
Fat has 2-2.5 times the amount of energy(calories) as protein. Look at the “Estimated Nutrient Content” box in the yellow portion of the reviews and the Calorie Weighted Basis numbers.
Ideally, FPR is near 50% give or take and caloric distribution from protein and fat should be near the same (give or take).
You can also calculate energy basis with this calculator:
https://secure.balanceit.com/tools/_gaconverter/
Puppies and active dogs require more fat and higher FPR where as seniors/lapdogs or dogs with a health issue can use lower amounts of fat and a lower FPR, and then some health issues (like Hill’s B/D for brain health) offers a moderate fat with high FPR food.
I feed moderate to high fat and various FPRs to my pug. Hope this helps a little. I’m not a technical person.
