More than half of pet dogs in the U.S. are estimated to be overweight or obese. Because it’s so common, many owners don’t recognize extra weight in their own dog. But even a few extra pounds can shorten a dog’s life and increase disease risk. Here’s how to tell if your dog is overweight and how to help.
Quick Answer: Use the body condition score (BCS): you should be able to feel your dog’s ribs easily with a thin fat cover, see a waist from above and see an abdominal tuck from the side. Safe weight loss is about 1–2% of body weight per week, using measured meals, fewer treats and more exercise, guided by your vet.
Why Extra Weight Matters
Overweight dogs are at higher risk of:
- Arthritis and joint pain. See arthritis in dogs.
- Diabetes
- Heart and breathing problems
- Some cancers
- Heat intolerance
- Shorter lifespan
A well-known long-term study of Labrador Retrievers found that dogs kept lean lived about 2 years longer than their heavier littermates.
Body Condition Scoring
Your vet may use a 9-point scale.
| Score | Description |
|---|---|
| 1–3 | Too thin: ribs, spine and hip bones easily visible |
| 4–5 | Ideal: ribs easily felt, visible waist and tummy tuck |
| 6–7 | Overweight: ribs harder to feel, waist barely visible |
| 8–9 | Obese: ribs can’t be felt, no waist, fat deposits on back and tail base |
The hand test
- Ribs: should feel like the back of your hand
- Overweight: feel like your palm
- Too thin: feel like your knuckles
The Association for Pet Obesity Prevention and VCA Animal Hospitals both offer resources on recognizing pet obesity.
Common Causes
- Overfeeding and free-feeding
- Too many treats and table scraps
- Not enough exercise
- Neutering (lowers calorie needs)
- Age
- Medical conditions like hypothyroidism
Pet Health Man has more on overweight dogs and how obesity affects your pet’s health.
How to Help Your Dog Lose Weight
1. See your vet
Rule out medical causes and get a target weight and calorie plan.
2. Measure food
Use a measuring cup or kitchen scale. See the right amount of food for your dog.
3. Choose the right food
Your vet may recommend a weight-management diet that’s high in protein and fiber to keep your dog full.
4. Cut back on treats
- Keep treats under 10% of daily calories.
- Use low-calorie options like green beans or carrots.
- Break treats into smaller pieces.
5. Increase activity
Add a few minutes to walks, play fetch or try swimming. See exercise needs by dog breed.
6. Use puzzle feeders
Slow eating and add mental stimulation.
7. Track progress
Weigh your dog every 2 to 4 weeks.
Safe Weight-Loss Rate
| Starting weight | About 1–2% per week |
|---|---|
| 40 lb (18 kg) | About 0.4–0.8 lb (0.2–0.4 kg) |
| 80 lb (36 kg) | About 0.8–1.6 lb (0.4–0.7 kg) |
Get the Family on Board
Everyone in the household needs to follow the plan. Keep a log of meals and treats so nobody double-feeds.
When to Call Your Vet
Call your vet if your dog:
- Gains weight despite eating less
- Is lethargic, has hair loss or feels cold (possible hypothyroidism)
- Pants heavily or struggles with exercise
- Loses weight unexpectedly
Low-Calorie Treat Ideas
| Treat | Approximate calories |
|---|---|
| Baby carrot | About 4 |
| Green bean | About 1–2 |
| Apple slice (no seeds) | About 5 |
| Cucumber slice | About 1 |
| Blueberries (5) | About 4 |
Swap high-calorie biscuits for these, or use a portion of your dog’s daily kibble as training treats.
Frequently Asked Questions
Is my dog just big-boned?
Breeds vary in size and build, but fat cover is what matters.
Can I just feed less of my dog’s current food?
Cutting portions too much can reduce nutrients. Weight-loss diets are designed to prevent deficiencies.
How long will weight loss take?
Often several months. Slow and steady is safest.
Do weight-loss supplements work?
Most have little evidence. Diet and exercise are the proven approach.
Can puppies be overweight?
Yes. Keeping puppies lean supports healthy joints and lifelong weight control.
Which breeds gain weight easily?
Labradors, Beagles, Dachshunds, Pugs and Cocker Spaniels are among breeds prone to weight gain.
Is my dog hungry all the time on a diet?
Some begging is normal. High-fiber foods, puzzle feeders and low-calorie vegetables help.
Does neutering cause weight gain?
Neutering lowers energy needs, so dogs can gain weight if portions aren’t adjusted. Measured meals prevent it.
Should I weigh my dog at home?
Yes. Small dogs can be weighed on a baby or kitchen scale. For larger dogs, weigh yourself holding the dog, then subtract your own weight, or use the clinic scale.
This article is for general information only and isn’t a substitute for professional veterinary advice. If you’re worried about your pet’s health, contact your veterinarian or an emergency animal hospital.
