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 ONE True Instinct High Protein with Real Chicken & Duck is on the lighter side: at 357 kcal per cup it has less energy than 76% of the 140 dry dog foods in our list, so the bowl will look fuller for the same calories.
To show how much the food matters: a 40 lb spayed or neutered dog needs about 985 kcal a day. That is 2 ¾ cups of this food, but 1 ⅞ cups of Purina Pro Plan All Ages Sport Performance 30/20 Salmon & Rice and 3 ⅝ cups of Kirkland Signature Healthy Weight Chicken and Vegetable. Same dog, same day, very different scoops.
A level 8 oz measuring cup holds about 90 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.
Purina ONE True Instinct High Protein with Real Chicken & Duck feeding chart
Daily amounts for healthy adult dogs with no treats, from the label calories and the AAHA 2021 energy factors. Split the amount into meals.
| Weight | Couch dog | Spayed or neutered | Very active |
|---|---|---|---|
| 5 lb 2.3 kg | ⅜ cup39 g | ⅝ cup52 g | ¾ cup65 g |
| 10 lb 4.5 kg | ¾ cup66 g | 1 cup88 g | 1 ¼ cups110 g |
| 15 lb 6.8 kg | 1 cup89 g | 1 ⅜ cups119 g | 1 ⅝ cups149 g |
| 20 lb 9.1 kg | 1 ¼ cups111 g | 1 ⅝ cups148 g | 2 cups185 g |
| 30 lb 13.6 kg | 1 ⅝ cups150 g | 2 ¼ cups200 g | 2 ¾ cups251 g |
| 40 lb 18.1 kg | 2 ⅛ cups187 g | 2 ¾ cups249 g | 3 ½ cups311 g |
| 50 lb 22.7 kg | 2 ½ cups221 g | 3 ¼ cups294 g | 4 ⅛ cups368 g |
| 60 lb 27.2 kg | 2 ¾ cups253 g | 3 ¾ cups337 g | 4 ⅝ cups421 g |
| 70 lb 31.8 kg | 3 ⅛ cups284 g | 4 ¼ cups378 g | 5 ¼ cups473 g |
| 80 lb 36.3 kg | 3 ½ cups314 g | 4 ⅝ cups418 g | 5 ¾ cups523 g |
| 90 lb 40.8 kg | 3 ¾ cups343 g | 5 ⅛ cups457 g | 6 ⅜ cups571 g |
| 100 lb 45.4 kg | 4 ⅛ cups371 g | 5 ½ cups494 g | 6 ⅞ cups618 g |
Label values: 357 kcal per cup, 3,959 kcal per kg. Source: purina.com, checked 18 Oct 2026.
Questions
How much Purina ONE True Instinct High Protein with Real Chicken & Duck should I feed a 50 lb dog?
About 3 ¼ cups or 294 g a day for a spayed or neutered dog, before treats. That is 1,164 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 ONE True Instinct High Protein with Real Chicken & Duck?
The label states 357 kcal per cup, 3,959 kcal per kg (checked 18 Oct 2026). Recipes change, so check your bag.
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