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
Diamond Naturals Light Adult Dog Lamb Meal & Rice is on the lighter side: at 310 kcal per cup it has less energy than 96% 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 3 ⅛ 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 102 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 is a weight-control recipe. If your dog needs to slim down, tick “Needs to lose weight” in the calculator and enter the target weight your vet gave you; the portion is then worked out for the target, not the current weight.
Diamond Naturals Light Adult Dog Lamb Meal & 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 | ½ cup51 g | ⅝ cup68 g | ⅞ cup85 g |
| 10 lb 4.5 kg | ⅞ cup86 g | 1 ⅛ cups115 g | 1 ⅜ cups143 g |
| 15 lb 6.8 kg | 1 ⅛ cups117 g | 1 ½ cups155 g | 1 ⅞ cups194 g |
| 20 lb 9.1 kg | 1 ⅜ cups145 g | 1 ⅞ cups193 g | 2 ⅜ cups241 g |
| 30 lb 13.6 kg | 1 ⅞ cups196 g | 2 ½ cups261 g | 3 ¼ cups327 g |
| 40 lb 18.1 kg | 2 ⅜ cups243 g | 3 ⅛ cups324 g | 4 cups406 g |
| 50 lb 22.7 kg | 2 ⅞ cups288 g | 3 ¾ cups384 g | 4 ¾ cups479 g |
| 60 lb 27.2 kg | 3 ¼ cups330 g | 4 ¼ cups440 g | 5 ⅜ cups550 g |
| 70 lb 31.8 kg | 3 ⅝ cups370 g | 4 ⅞ cups494 g | 6 cups617 g |
| 80 lb 36.3 kg | 4 cups409 g | 5 ⅜ cups546 g | 6 ⅝ cups682 g |
| 90 lb 40.8 kg | 4 ⅜ cups447 g | 5 ⅞ cups596 g | 7 ¼ cups745 g |
| 100 lb 45.4 kg | 4 ¾ cups484 g | 6 ⅜ cups645 g | 7 ⅞ cups806 g |
Label values: 310 kcal per cup, 3,035 kcal per kg. Source: diamondpet.com, checked 18 Oct 2026.
Questions
How much Diamond Naturals Light Adult Dog Lamb Meal & Rice should I feed a 50 lb dog?
About 3 ¾ cups or 384 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 Diamond Naturals Light Adult Dog Lamb Meal & Rice?
The label states 310 kcal per cup, 3,035 kcal per kg (checked 18 Oct 2026). Recipes change, so check your bag.
More from Diamond
- Naturals Adult Dog Lamb Meal & Rice
- Naturals Adult Dog Beef Meal & Rice
- Naturals All Life Stages Dog Chicken & Rice
- Naturals Large Breed Adult Dog Chicken & Rice
- Naturals Small & Medium Breed Puppy Chicken & Rice
- Naturals Large Breed Puppy Lamb & Rice
- Naturals Small Breed Adult Dog Chicken & Rice
- Naturals Senior Dog Chicken, Egg & Oatmeal
- Naturals Skin & Coat All Life Stages Dog Salmon & Potato
- Naturals Extreme Athlete Adult Dog Chicken & Rice