Signs Your Dog Is Overweight (and How to Fix It)

If you can't easily feel your dog's ribs under a thin layer of fat, and you can't see a clear waist when you look down at them from above, your dog is probably carrying too much weight. About 59% of US dogs are overweight or obese according to the Association for Pet Obesity Prevention's 2022 survey, so this is common, fixable, and worth taking seriously.

The 5-Second Home Check

Stand over your dog and look down. Then run your hands along their sides. You're checking three things vets check at every exam.

Ribs. Place your palms flat on each side of the chest. You should feel the ribs with light pressure, like feeling the back of your hand. If you have to press to find them, there's too much fat. If they stick out visibly with no fat cover, your dog is underweight.

Waist. Looking down from above, you want to see an hourglass shape behind the ribcage. No tuck at all means overweight. An extreme tuck with visible hip bones means underweight.

Abdominal tuck. From the side, the belly should slope up from the chest toward the back legs. A belly that hangs level with or below the ribcage is a sign of excess weight, fluid, or both.

The 9-Point Body Condition Score

Vets use the WSAVA 9-point Body Condition Score (BCS) chart. Here's what each range means in plain terms.

BCS 1-3: Underweight

• 1/9: Ribs, spine, and hip bones visible from a distance. No body fat, obvious muscle loss.
• 2/9: Ribs easily visible. Severe waist tuck.
• 3/9: Ribs easily felt with no fat cover. Visible waist and tuck.

BCS 4-5: Ideal

• 4/9: Ribs felt easily with minimal fat. Waist visible from above.
• 5/9: Ribs palpable without excess fat. Waist visible. Abdomen tucked up.

This is your target. Most dogs live longer at BCS 4-5. A 14-year Purina study on Labradors found dogs kept at BCS 4-5 lived a median of 1.8 years longer than littermates fed 25% more.

BCS 6-9: Overweight to Obese

• 6/9: Ribs palpable with slight excess fat. Waist barely visible.
• 7/9: Ribs hard to feel under heavy fat. No waist. Fat deposits on lower back and base of tail.
• 8/9: Ribs not palpable without firm pressure. Obvious abdominal distension. Heavy fat on spine and tail base.
• 9/9: Massive fat deposits everywhere. Belly distended. No waist or tuck.

Every point above 5 is roughly 10-15% over ideal weight. A 60-pound Lab at BCS 7 likely needs to lose 6-9 pounds.

What Overweight Actually Costs Your Dog

Carrying extra weight isn't a cosmetic issue. It shortens lifespan and increases the risk of:

• Osteoarthritis (overweight Labs developed arthritis 6 years earlier in the Purina study)
• Type 2 diabetes
• Heart disease and high blood pressure
• Torn cruciate ligaments (a TPLO surgery to repair one runs $3,500-$6,000 per knee)
• Heat intolerance and breathing problems, especially in flat-faced breeds
• Some cancers, including mammary tumors

Insurance claims for orthopedic surgery and diabetes management are some of the most expensive lifetime costs. If you want to model whether pet insurance is worth it for your dog's breed and weight profile, the insurance break-even calculator does the math.

A Weight-Loss Plan That Works

Crash diets backfire in dogs the same way they do in humans. The goal is steady loss of 1-2% of body weight per week.

Step 1: Get a baseline weight and target

Weigh your dog (hold them and stand on a scale, then subtract your weight if they won't sit still). If your vet says they're at BCS 7, target weight is current weight divided by about 1.2. So a 60-pound dog at BCS 7 aims for 50 pounds.

Step 2: Calculate weight-loss calories

For weight loss, feed roughly 60-70% of the resting energy requirement (RER) for the dog's target weight, not current weight.

RER (kcal/day) = 70 × (target weight in kg)^0.75

Worked example: A Lab whose target is 50 lb (22.7 kg) has an RER around 725 kcal. Feed 60-70% of that for weight loss, so roughly 435-510 kcal per day. That's a real cut for a dog who's been eating 1,200 kcal of kibble and table scraps.

The food portion calculator does this math by breed, target weight, and food brand.

Step 3: Measure every meal

Eyeballing a "cup" of kibble is off by 30-80% in most households, according to a 2019 University of Guelph study. Use a kitchen scale and weigh the food in grams. It takes 10 seconds and is the single biggest fix most owners need.

Step 4: Fix treats and table food

Treats should be under 10% of daily calories. A single piece of cheddar is about 110 kcal, roughly a quarter of a small dog's daily allowance. Swap to green beans, baby carrots, or single-ingredient freeze-dried meat treats and break them into small pieces.

Step 5: Add movement gradually

Two 20-minute walks a day, plus some sniff-walks (slow, off-pace, letting them sniff) burn calories and reduce begging behavior. Don't start with hour-long hikes if your dog is BCS 8. Joints need time.

Step 6: Reweigh every two weeks

Track the trend. If your dog hasn't lost weight after 4 weeks, drop calories by another 10%. If they've lost more than 2% per week, add a bit back. Faster isn't better.

When to Bring In Your Vet

Get a vet involved before starting any diet if your dog is BCS 8 or 9, has known thyroid or Cushing's symptoms (drinking a lot, pot belly, hair loss), is a senior, or has joint disease. Sudden weight gain without a diet change is a medical sign, not a feeding problem.

Most dogs hit their target weight in 6-12 months on a measured plan. The hardest part is the first three weeks of hungry looks. Hold the line.

Run the numbers for your dog: /paws/tools/food-portion-calculator