You should aim for 10 calories of food per pound of bodyweight as this will put you into a calorie deficit that will get you results fast. (x-size.com)
We also provide protein content by ounce of food weight and by 100 calories of food intake. (dietgrail.com)
So, if your young pooch is 10 pounds, he'll need around 70 calories of food per pound daily, or 700 calories. (dogcare.dailypuppy.com)