Health Conditions
How Much to Feed a Dog to Lose Weight
AlphaPak · Reviewed by our veterinary and formulation team · Updated August 3, 2026
Ask your vet to set the goal. Safe weight loss is slower than most owners expect, and dropping it fast brings its own risks. The real work is simple: measure every meal, count treats in the daily total, and weigh your dog every two weeks.
Start with the target, not the food
The single most common mistake is picking a new food before anyone has decided what the goal actually is. Ask your vet for two numbers: your dog's body condition score now, and a target weight. Everything else follows from those.
Portions should be calculated from the weight you are aiming at, not the weight your dog is today. Otherwise you are feeding to maintain the problem.
Why it is worth the effort
This is the best-evidenced area in canine nutrition, which is unusual and worth knowing.
In a study of 50,787 dogs across 12 breeds, overweight dogs had a higher risk of death at every age, in every breed examined. Median lifespan was shorter in overweight dogs in all twelve. The largest gap was in Yorkshire Terriers, at 13.7 years for overweight dogs versus 16.2 for those at a normal body condition (Salt et al., 2019).
A separate lifelong study of Labrador littermates (same food, one group fed 25% less) found the leaner dogs lived about 1.8 years longer, roughly 15%, with age-related disease appearing later. Carrying more than 25% body fat went along with insulin resistance, which independently predicted a shorter life (Lawler et al., 2008).
And the benefits arrive earlier than the lifespan numbers suggest. In overweight dogs with arthritis, owners reported less limping after roughly 6% of body weight came off, with gait analysis confirming it by around 9% (Marshall et al., 2010). For a 60-pound dog, 6% is under four pounds.
Is my dog actually overweight?
Judge with your hands. Coat length hides a great deal, and the number on the scale means little without knowing the frame it sits on.
- Ribs: you should feel them easily with light pressure, under a thin layer. Having to press to find them means extra covering.
- From above: there should be a visible waist behind the ribcage. A straight or bulging outline means extra.
- From the side: the belly should tuck up behind the ribs rather than running level.
Vets score this from 1 to 9, with 4 to 5 as the target. Ask for the score at every visit and write it down. The trend matters more than any single reading.
Where the calories are actually hiding
Before changing the food, audit what is already going in. In most households that have plateaued, the answer is here.
| Source | What to do about it |
|---|---|
| Treats and training rewards | Keep all treats under 10% of daily calories; break them into smaller pieces |
| Dental chews | Often surprisingly calorific, so count them in the daily total |
| Table scraps and leftovers | The hardest one socially; agree a household rule |
| A scoop instead of a measuring cup | Weigh the food or use a proper measuring cup. Eyeballing drifts upward |
| Food left down all day | Switch to set meals so you know what was actually eaten |
| Another person feeding too | Very common. One person should own the daily total |
Doing it properly
- Get the target weight and daily calorie allowance from your vet.
- Measure every meal with a measuring cup, or better, a kitchen scale.
- Count the treats inside the allowance rather than on top of it.
- Weigh your dog every one to two weeks, on the same scale, and record it.
- Expect slow progress. Steady loss over months is the goal.
- Keep them moving within whatever their joints and heart allow. Your vet can advise.
- Adjust based on the trend, not on a single weigh-in.
If your dog seems genuinely hungry throughout, tell your vet. There are ways to increase the volume of food without increasing calories, and a plan the dog is miserable on is a plan that gets abandoned.
Where AlphaPak fits, and one honest caution
The useful property is protein. Both recipes are 51% protein from whole meat and organ, and keeping protein up while calories come down helps a dog hold muscle while losing fat. That matters more than it sounds: muscle supports joints, and a dog who loses muscle along with the fat often ends up less mobile, not more.
The caution is that our food is calorie-dense. At roughly 4,500 calories per kilogram, a small extra scoop is a lot of extra calories, considerably more than the same visual amount of most kibble. Do not eyeball it. Use a measuring cup or a scale, every time. Our Find your recipe quiz gives a maintenance starting point, and for a dog losing weight your vet will want you below that figure.
Being straight about the limits: we are not a formulated weight-loss diet. Those are built to be lower in calories per cup so a dog can eat a satisfying volume while taking in less, and for a dog who is very overweight or constantly hungry, that design has real advantages. If your vet recommends one, that is a sound recommendation.
What to do this week
Get a body condition score and a target weight. Put the measuring cup somewhere you cannot avoid it. Add up the treats honestly for three days before changing anything. Most people are surprised. Then weigh your dog, write the number down, and diary a reweigh for two weeks' time.
Common questions
- How much should I feed my dog to lose weight?
- Your vet should set the number, based on your dog's target weight rather than their current one. A common approach is a modest reduction from current intake, then reweighing every one to two weeks and adjusting. Cutting food drastically tends to leave a dog hungry and miserable and can cost muscle rather than fat.
- How fast should a dog lose weight?
- Slowly. Safe canine weight loss is measured over months, not weeks. Rapid loss risks losing lean muscle along with fat, and in some cases can cause other problems. Steady, small reductions that your dog can sustain beat an aggressive plan that gets abandoned.
- How do I know if my dog is overweight?
- Use your hands rather than the scale. You should be able to feel the ribs easily under a thin covering, see a waist behind the ribs from above, and see the belly tuck up from the side. If the ribs are hard to find and the waist has gone, your dog is likely carrying extra. Your vet can confirm with a body condition score.
- Do I need a special weight loss dog food?
- Not necessarily. Many dogs lose weight on their normal food, fed in a properly measured, reduced amount with the treats brought under control. Some dogs do better on a food formulated for weight loss because it lets them eat a larger volume for the same calories. That is a conversation with your vet.
- Why is my dog not losing weight?
- Most often, more calories are going in than anyone realises: treats, chews, table food, and a scoop rather than a measured cup all add up. It is also worth ruling out medical causes such as an underactive thyroid or Cushing's disease, both of which make weight loss difficult until treated.
Sources
- Salt, C., Morris, P. J., Wilson, D., Lund, E. M., & German, A. J. (2019). Association between life span and body condition in neutered client-owned dogs. Journal of Veterinary Internal Medicine. DOI: 10.1111/jvim.15367
- Lawler, D. F., Larson, B. T., Ballam, J. M., Smith, G. K., et al. (2008). Diet restriction and ageing in the dog: major observations over two decades. British Journal of Nutrition. DOI: 10.1017/S0007114507871686
- Marshall, W. G., Hazewinkel, H. A. W., Mullen, D., De Meyer, G., Baert, K., & Carmichael, S. (2010). The effect of weight loss on lameness in obese dogs with osteoarthritis. Veterinary Research Communications. DOI: 10.1007/s11259-010-9348-7
AlphaPak is a food, not a medicine. Our products are not intended to diagnose, treat, cure, or prevent any disease. Statements about nutrition describe the role of whole-food ingredients in supporting normal health and are not a substitute for veterinary care. Individual results vary.