More than 50% of dogs are overweight. How to assess your dog's body condition, how often to weigh them, and what to do if the numbers are going the wrong way.
Over 50% of dogs in the UK and US are overweight or obese, according to veterinary surveys. Yet when owners are asked to assess their own dog's weight, most underestimate it. Extra weight on a dog looks "normal" because we're used to seeing it.
This matters. Obesity in dogs is linked to:
Ideal weight varies enormously by breed, a healthy Chihuahua might weigh 2.5 kg; a healthy Newfoundland 60 kg. This is why vets use the Body Condition Score (BCS), a 1–9 scale (or 1–5 in some systems) that describes physical condition rather than weight.
Ideal (BCS 4–5/9):
Overweight (BCS 6–7/9):
Obese (BCS 8–9/9):
Check your dog monthly using the rib test: place your thumbs on the spine and spread fingers across the ribcage. If you can feel each rib with gentle pressure, ideal. If you have to press hard: overweight. If you cannot feel them at all, that is obese.
| Life stage | Recommended frequency |
|---|---|
| Puppies (under 6 months) | Weekly |
| Puppies (6–12 months) | Every 2 weeks |
| Adults | Monthly |
| Seniors | Every 2–4 weeks |
| Dogs on a weight loss plan | Weekly |
Weigh at the same time of day, before a meal, on the same scales. Most vet clinics allow you to use their scales between appointments at no charge.
A 5% increase in body weight warrants attention. Especially in smaller dogs, where 5% might be less than 300 g but represents meaningful extra load on joints and organs.
Don't wait until the annual vet check. If your dog's weight is creeping up over 3–4 months, adjust now:
Never put a dog on a crash diet. Rapid weight loss in dogs carries health risks. A loss of 1–2% of body weight per week is the safe target.
Weight gain without obvious cause:
Weight loss without obvious cause:
Any unexplained weight loss of more than 5% over 4 weeks deserves a vet visit.
In PetsyPlanet, the weight tracker gives you:
The trend matters more than any single measurement. A chart showing slow upward drift over 6 months tells a story that a single weigh-in can't.
Weight management is one of the most impactful things you can do for your dog's longevity and quality of life, and one of the most neglected. Start tracking monthly, learn to read the body condition score, and act on early trends rather than waiting until the problem is serious.
If your dog is already overweight, speak to your vet about a structured weight loss plan. Doing it safely is more effective than doing it fast.
This article is informational and does not replace a consultation with a veterinarian. Vaccination and deworming schedules and dietary advice are chosen individually. For the age, health and lifestyle of a particular animal. If you notice worrying symptoms, contact a vet.
Krystian Rygiel
Creator of PetsyPlanet. Writes about dog health because he's a dog owner himself and knows how important good medical records are.
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