Is my dog overweight? How to check in two minutes

On this page

1. The three checks: ribs, waist, tuck
2. The 9-point scale, score by score
3. Each point above 5 is about 10 percent
4. You're not alone: 59 percent
5. Why it matters: 2.5 years and 2.3 times
6. What to do next: target, walks, vet
7. Track the trend, not the day

Run three checks. Ribs: with flat fingers on the chest you should feel them easily under a thin layer, like the back of your hand; if you have to press, there is too much fat. Waist: from above, the body should narrow behind the ribs; a straight line or a bulge means overweight. Tuck: from the side, the belly should rise from the chest toward the hips; a level or sagging belly is a fat belly. Two or three failed checks put a dog at a body condition score of 6 or more out of 9, and each point above 5 is roughly 10 percent over ideal weight.

The three checks: ribs, waist, tuck

Vets do this in the exam room in about thirty seconds, and you can do it on the sofa. The AKC, VCA and PetMD describe the same three tests:

1. Rib check. Stand or sit the dog and run flat fingertips along the ribcage with light pressure, the way you would stroke them. Ideal feels like the back of your hand: bones easily felt under a thin cover. Overweight feels like your palm: you have to push to find them. Underweight feels like your knuckles: ribs visible and sharp.
2. Waist check. Look down at the dog from above. Behind the ribs, the outline should narrow into a waist before the hips. Heavy coats hide this; use your hands along the flanks instead.
3. Tuck check. Look from the side at dog height. The line of the belly should slope upward from the end of the ribcage toward the back legs. A flat line is overweight; a downward sag is obese.

The 9-point scale, score by score

The 9-point body condition score (BCS) is the standard in North American veterinary practice, and AAHA's guidelines ask for it to be recorded at every visit. Four and five are ideal. Each point above five is about 10 percent over ideal body weight.

The percentage column is the useful part. It lets you turn a score into a target weight, which is the subject of How much should my dog weigh?.

Each point above 5 is about 10 percent

A dog scored 7/9 at 66 lb has an ideal weight around 55 lb. That gap is not cosmetic. It is the difference between a dog that can feel its own ribs and one carrying the equivalent of a ten-pound backpack on every walk and every jump onto the sofa. Because the scale is relative to the individual dog, it works for a 5 lb Chihuahua and a 130 lb Newfoundland alike, which is why vets prefer it to breed weight charts.

You're not alone: 59 percent

The Association for Pet Obesity Prevention's 2022 survey, in which veterinary professionals scored the dogs rather than owners guessing, classified 59 percent of US dogs as overweight or obese. Their owner-opinion surveys tell the other half of the story: only about a third of owners think their own dog is overweight. The gap between those two numbers is the reason to do the three checks yourself rather than trust the eye that sees the dog every day.

Why it matters: 2.5 years and 2.3 times

Two studies carry most of the weight here. In a 2019 analysis of 50,787 neutered dogs across twelve breeds, published in the Journal of Veterinary Internal Medicine, overweight dogs had shorter median lifespans in every breed, by five months in German Shepherds and up to two and a half years in Yorkshire Terriers. And Banfield's State of Pet Health report, drawn from millions of veterinary visits, found overweight dogs about 2.3 times as likely to be diagnosed with osteoarthritis. Weight and joints feed each other: the heavier dog walks less, and the dog that walks less gets heavier. The full evidence, including the Labrador diet-restriction study, is in Do overweight dogs live shorter lives?.

What to do next: target, walks, vet

1. Estimate the target. Score honestly, then divide the current weight by 1 plus 0.1 times the points above 5. A 7/9 dog at 66 lb: 66 ÷ 1.2 = 55 lb.
2. See the vet if the dog is more than about 10 percent over, is a senior, or has any condition. Vets rule out medical causes, set a safe rate of loss (usually 1 to 2 percent of body weight a week at most) and confirm the target.
3. Let portions do the heavy lifting. A walk burns far less than people hope; see How many calories does a dog burn on a walk?. The daily need for the target weight, not the current one, is what feeding should be based on, and the calorie needs calculator shows how vets compute it.
4. Walk for muscle, joints and habit. The plan in Helping your dog lose weight by walking: an 8-week plan builds from 30 minutes a day to 45 or 60 over eight weeks.

Track the trend, not the day

A single weigh-in is noise: water, a meal, the scale itself. What tells you the plan is working is the line through a month of weigh-ins compared with the ideal. Weigh at the same time of day, on the same scale, weekly during a weight plan and monthly otherwise. How to do it at home, for dogs from 5 lb to 150, is in How to weigh a dog at home.

Frequently asked questions

What are the signs of an overweight dog?

Ribs you have to press to feel, no visible waist from above, a belly that hangs level or sags from the side, fat pads at the base of the tail, and a dog that tires early, pants a lot or is reluctant to jump. A body condition score of 6 or more out of 9 confirms it.

How much is 10 percent overweight for a dog?

For a dog whose ideal weight is 50 lb, 10 percent over is 55 lb, which sounds trivial and is a body condition score of 6/9, the first step into overweight. At 20 percent over (60 lb) a dog is clinically obese by most definitions.

Is my dog overweight or just big-boned?

Frame size shows in height and length, not in whether you can feel the ribs. A large-framed dog at a healthy condition still has palpable ribs, a waist and a tuck. If those are missing, the extra is fat, whatever the frame.

How many dogs are overweight?

In the last veterinary-assessed national survey by the Association for Pet Obesity Prevention (2022), 59 percent of US dogs were classified as overweight or obese. Owners consistently underestimate it: only about a third think their own dog is.

Should I put my dog on a diet?

Talk to your vet first, especially for a dog more than 10 to 15 percent over ideal, a senior, or a dog with any medical condition. Vets rule out causes such as hypothyroidism and set a safe rate of loss. This guide, and Pawdometer, give no feeding advice.

This guide is general information from published veterinary and scientific sources, not veterinary advice. Every dog is different: for exercise, weight or feeding decisions, talk to your vet. Pawdometer never gives diet advice.