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 Kitten Healthy Start Chicken is one of the more calorie-dense dry cat foods we track: at 4,255 kcal per kg it has more energy than 100% of the 20 dry cat foods in our list. You will pour less of it than you might expect.
To show how much the food matters: a 1.8 kg kitten needs about 272 kcal a day. That is 64 g of this food, but 64 g of Purina Pro Plan Kitten Healthy Start Chicken and 76 g of Hill's Science Plan Sterilised Adult with Chicken. Same cat, same day, very different scoops.
Kittens need about two and a half times their resting energy until they are a year old. The Merck Veterinary Manual notes that kittens can also be fed free choice. If you portion meals, weigh your kitten weekly and recalculate.
Purina Pro Plan Kitten Healthy Start Chicken feeding chart
Daily amounts for growing kittens with no treats, from the label calories and the AAHA 2021 energy factors. Split the amount into meals.
| Weight | Kitten |
|---|---|
| 0.5 kg | 24 g |
| 1 kg | 41 g |
| 1.5 kg | 56 g |
| 2 kg | 69 g |
| 2.5 kg | 82 g |
| 3 kg | 94 g |
| 4 kg | 116 g |
Label values: 4,255 kcal per kg. Source: purina.co.uk, checked 18 Oct 2026.
Questions
How much Purina Pro Plan Kitten Healthy Start Chicken should I feed a 2 kg kitten?
About 69 g a day for a kitten, before treats. That is 294 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 Kitten Healthy Start Chicken?
The label states 4,255 kcal per kg (checked 18 Oct 2026). Recipes change, so check your bag.