The maths, with your numbers
No guesswork and no brand chart. This is the same calculation a vet does on paper, so you can check it.
What this means for the bowl
Purina Pro Plan Sport Development 30/18 Large Breed Chicken & Rice Dry Puppy Food is one of the more calorie-dense dry dog foods we track: at 430 kcal per cup it has more energy than 86% of the 140 dry dog foods in our list. You will pour less of it than you might expect.
To show how much the food matters: a 15 lb puppy needs about 590 kcal a day. That is 1 ⅜ cups of this food, but 1 ⅛ cups of Purina Pro Plan All Ages Sport Performance 30/20 Salmon & Rice and 2 ⅛ cups of Kirkland Signature Healthy Weight Chicken and Vegetable. Same dog, same day, very different scoops.
A level 8 oz measuring cup holds about 103 g of this kibble. If you have kitchen scales, weighing is more accurate than scooping, because a heaped cup holds noticeably more than a level one.
This food is made for puppies that will be big dogs. Large breeds should grow at a steady pace, so keep your puppy lean. Puppies need about three times their resting energy until 4 months, then about twice. Weigh weekly, because the portion changes as they grow.
Purina Pro Plan Sport Development 30/18 Large Breed Chicken & Rice Dry Puppy Food feeding chart
Daily amounts for growing puppys with no treats, from the label calories and the AAHA 2021 energy factors. Split the amount into meals.
| Weight | Under 4 months | 4 months and older |
|---|---|---|
| 2 lb 0.9 kg | ½ cup47 g | ¼ cup31 g |
| 5 lb 2.3 kg | ⅞ cup93 g | ⅝ cup62 g |
| 10 lb 4.5 kg | 1 ½ cups156 g | 1 cup104 g |
| 15 lb 6.8 kg | 2 cups211 g | 1 ⅜ cups141 g |
| 20 lb 9.1 kg | 2 ½ cups262 g | 1 ¾ cups175 g |
| 30 lb 13.6 kg | 3 ½ cups355 g | 2 ¼ cups237 g |
| 40 lb 18.1 kg | 4 ¼ cups441 g | 2 ⅞ cups294 g |
| 50 lb 22.7 kg | 5 ⅛ cups521 g | 3 ⅜ cups347 g |
| 60 lb 27.2 kg | 5 ⅞ cups597 g | 3 ⅞ cups398 g |
Label values: 430 kcal per cup, 4,188 kcal per kg. Source: purina.com, checked 18 Oct 2026.
Questions
How much Purina Pro Plan Sport Development 30/18 Large Breed Chicken & Rice Dry Puppy Food should I feed a 20 lb puppy?
About 1 ¾ cups or 175 g a day for a puppy aged 4 months or more, before treats. That is 732 kcal a day divided by the food’s label value. Use the calculator above to adjust for your pet.
How many calories are in Purina Pro Plan Sport Development 30/18 Large Breed Chicken & Rice Dry Puppy Food?
The label states 430 kcal per cup, 4,188 kcal per kg (checked 18 Oct 2026). Recipes change, so check your bag.
More from Purina Pro Plan
- Adult Sensitive Skin & Stomach Salmon & Rice
- Puppy Sensitive Skin & Stomach Salmon & Rice
- Puppy Chicken & Rice
- Adult Complete Essentials Shredded Blend Chicken & Rice with Probiotics
- Adult Large Breed Chicken & Rice
- Adult Toy Breed Chicken & Rice
- Weight Management Chicken and Rice
- Adult 7+ Shredded Blend Chicken & Rice Large Breed Senior
- Complete Essentials Adult Chicken & Rice Entrée Classic
- Sensitive Skin & Stomach Salmon & Rice Entrée Classic