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 Adult Small Breed Chicken & Rice is one of the more calorie-dense dry dog foods we track: at 448 kcal per cup it has more energy than 88% 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 40 lb spayed or neutered dog needs about 985 kcal a day. That is 2 ¼ 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 112 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 Pro Plan Adult Small Breed Chicken & Rice 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 | ½ cup52 g | ⅝ cup64 g |
| 10 lb 4.5 kg | ⅝ cup65 g | ¾ cup87 g | 1 cup108 g |
| 15 lb 6.8 kg | ¾ cup88 g | 1 cup118 g | 1 ⅜ cups147 g |
| 20 lb 9.1 kg | 1 cup109 g | 1 ¼ cups146 g | 1 ⅝ cups182 g |
| 30 lb 13.6 kg | 1 ⅜ cups148 g | 1 ¾ cups198 g | 2 ¼ cups247 g |
| 40 lb 18.1 kg | 1 ⅝ cups184 g | 2 ¼ cups245 g | 2 ¾ cups307 g |
| 50 lb 22.7 kg | 2 cups218 g | 2 ⅝ cups290 g | 3 ¼ cups363 g |
| 60 lb 27.2 kg | 2 ¼ cups249 g | 3 cups333 g | 3 ¾ cups416 g |
| 70 lb 31.8 kg | 2 ½ cups280 g | 3 ⅜ cups373 g | 4 ⅛ cups467 g |
| 80 lb 36.3 kg | 2 ¾ cups310 g | 3 ¾ cups413 g | 4 ⅝ cups516 g |
| 90 lb 40.8 kg | 3 cups338 g | 4 cups451 g | 5 cups564 g |
| 100 lb 45.4 kg | 3 ¼ cups366 g | 4 ⅜ cups488 g | 5 ½ cups610 g |
Label values: 448 kcal per cup, 4,012 kcal per kg. Source: purina.com, checked 18 Oct 2026.
Questions
How much Purina Pro Plan Adult Small Breed Chicken & Rice should I feed a 50 lb dog?
About 2 ⅝ cups or 290 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 Pro Plan Adult Small Breed Chicken & Rice?
The label states 448 kcal per cup, 4,012 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