Lowest calorie dog food
There is no single figure on a dog food label marked calories that makes comparison simple — the energy content depends on the fat, protein and fibre levels together, and it is usually calculated per 100 grams rather than stated as one headline number. Comparing foods properly means reading the whole analytical panel, not just picking the bag that claims to be lowest calorie.
What actually drives calorie content
Fat is the most calorie-dense part of any dog food by a clear margin, so foods with a lower fat percentage on the analytical constituents panel are generally lower in calories overall, all else being similar. Protein and carbohydrate contribute fewer calories per gram than fat does.
Fibre content matters too, since a higher-fibre food tends to be less calorie-dense and can help a dog feel fuller on a smaller portion, which is one reason many weight-management foods lean on added fibre alongside a lower fat level.
How to actually compare foods
Look for calories expressed as kcal per 100 grams on the packaging, and compare that figure directly between foods rather than relying on words like light or diet on the front of the bag, which are not strictly regulated in the same way as the nutritional panel.
Comparing wet and dry food directly is misleading, since wet food contains far more water by weight, which dilutes the calorie count per 100 grams substantially compared with a dry kibble. Compare like with like, or convert to a per-meal rather than per-100g basis if you are mixing the two.
Reading beyond the calorie count
A lower-calorie food is not automatically the right choice for every dog. An active working dog or a puppy needs more energy-dense food to support their activity or growth, while a lower-calorie recipe is more relevant for a less active adult, an overweight dog, or a senior slowing down.
Portion size matters as much as the food itself — overfeeding a lower-calorie food can still lead to weight gain, and underfeeding a standard food is not a sensible way to manage weight either. Follow a feeding guide based on your dog's actual weight and body condition.
What we stock, and who it suits
We carry a range of lower-calorie, light and senior recipes formulated with reduced fat and added fibre for less active or overweight dogs, alongside standard adult foods. What is shown in the grid above reflects what is currently available to order.
If your dog is overweight, it is worth discussing a target weight and feeding plan with your vet before choosing a food independently, since a lower-calorie diet works best alongside a proper feeding amount rather than just a different bag on the shelf.
Our picks, and why
Everything below is in stock with us, priced with delivery worked out, and packed and posted by hand in the UK.
Forthglade Cold Pressed Natural Turkey
Cold-pressed turkey kibble for dogs from 2 months, soft enough to mix with water for young pups
£45.99
Forthglade Cold Pressed Grain Free Salmon
Cold-pressed grain-free dry food for dogs, built on fresh and dried salmon
From£16.99
Forthglade Cold Pressed Grain Free Duck
Cold-pressed grain-free duck food with fruit and botanicals, in two bag sizes
From£16.99
Forthglade Cold Pressed Grain Free Chicken
Cold-pressed grain-free chicken food with fruit and botanicals, in three bag sizes
From£16.99
Forthglade Complete Meal Lightly Baked Turkey
A lightly baked complete dry food, 50% turkey, for adult dogs of any breed
From£12.49
Forthglade Complete Meal Lightly Baked Chicken
A grain-free complete dry food for adult dogs, lightly baked and built on 50% chicken
From£12.49
Forthglade Cold Pressed Small Dog Turkey
Cold-pressed grain-free dry food for small dogs and puppies, built on turkey
£16.99
Forthglade Complete Meal Lightly Baked Lamb
A lightly baked complete dry food, 50% lamb, for adult dogs of any breed
From£12.49
Forthglade Cold Pressed Grain Free Turkey
Grain-free cold-pressed turkey kibble for dogs, gentle on sensitive stomachs
£69.69
Forthglade British Classics Chicken Family Lunch
Complete Forthglade wet dog food with 75% chicken in a 395G tray
£2.45
Harringtons Puppy Turkey & Rice
Complete turkey puppy food with 30% protein and feeding bands by adult weight
£6.49
Harringtons Adult Dog Turkey Veg
Complete dry food for adult dogs with turkey, chicken and salmon oil, 21% protein
From£3.39
Common questions
- How do I find the lowest calorie dog food?
- Compare the kcal per 100 grams figure across foods of the same type — dry with dry, wet with wet — rather than relying on front-of-bag claims like light or diet, which are not as tightly regulated as the nutritional panel itself.
- Is a low-calorie food always better for weight loss?
- Not on its own. Portion control matters just as much as the food's calorie density, and a vet-guided feeding plan based on your dog's actual weight and target is a more reliable approach than switching food alone.
- Do senior dogs need lower calorie food?
- Many do, since activity levels often reduce with age, but not every senior dog needs it — it depends on their individual weight and activity. A vet can advise on whether a lighter recipe suits your specific dog.
- Is wet food lower calorie than dry food?
- Wet food generally shows a lower calorie count per 100 grams because of its higher water content, but that does not mean it is actually lower calorie per meal once portion sizes are compared properly. Check the feeding guide for an accurate comparison.
Related
Written by Matt Garnett, who runs Giddy Pets and is a lifelong pet owner — not a vet. This is general information, not veterinary advice, and it cannot replace an examination by the vet who knows your animal. How we write these guides.