What To Know About Obesity in Dogs and How To Prevent It

More than half of all dogs in the US are overweight. While a chubby pup might look adorable, those extra pounds can contribute to serious health issues—including joint problems, diabetes, and reduced life expectancy.

So, how can you tell if your dog is carrying too much weight? And what should you do if they are? We consulted veterinary experts to help you recognize, prevent, and manage dog obesity—so your pup can feel and look their best.

What Is Dog Obesity?

Dog obesity is defined as an excess accumulation of body fat that negatively impacts health.

While definitions vary slightly, most veterinary organizations classify dogs as:

Overweight if they weigh 10–20% above their ideal weight
Obese if they exceed their ideal weight by 20% or more

For example, a dog with an ideal weight of 50 pounds would be considered overweight at 55–60 pounds—and obese at 60 pounds or more.

Unfortunately, dog obesity is widespread: an estimated 40–50% of dogs worldwide fall into the obese category.

How To Tell If Your Dog Is Overweight

Weighing Your Dog

The simplest way to assess weight is by weighing your dog—especially if you know their ideal weight. You can use a pet scale, like the FurPetVo Precision Digital Scale, or weigh yourself while holding your dog and subtract your own weight (for smaller dogs).

A person gently placing a medium-sized dog on a digital pet scale in a home setting

Body Condition Score (BCS) Guide

Another reliable at-home tool is the Body Condition Score (BCS), a standardized 1–9 scale used by veterinarians:

1–3 (Underweight): Ribs, spine, and hip bones are highly visible or easily felt with no fat coverage.
4–5 (Ideal Weight): Ribs are easy to feel with a slight fat covering; a clear waistline is visible when viewed from above.
6–7 (Overweight): Ribs are harder to feel; waistline is less defined; fat deposits appear around the chest and base of the tail.
8–9 (Obese): Ribs are difficult to feel under thick fat; little to no waist definition; excess fat is noticeable across the body.

While BCS is helpful, the most accurate assessment comes from your veterinarian. They’ll weigh your dog, determine their ideal weight, and create a personalized plan if weight loss is needed.

Visual and Behavioral Signs

According to Dr. Antje Beth-Joslin, DVM, co-owner of Tolleson Animal Clinic and FurPetVo consultant, obesity shows up in two main ways: visual cues and behavior changes.

Visual signs include:

No visible waist when viewed from above
No abdominal tuck when viewed from the side
Ribs, spine, and hip bones difficult to feel with light pressure
Noticeable fat deposits around the neck, chest, and base of the tail

Behavioral signs may include:

Reduced stamina or difficulty keeping up on walks
Lethargy or increased sleeping
Heavy panting—even after light activity
Reluctance to move, exercise, or play
Struggling to jump onto furniture or climb stairs

Risks Associated With Obesity in Dogs

Just like in humans, obesity poses serious health risks for dogs. “Studies have shown that overweight dogs have a significantly shorter lifespan than dogs with a healthy body condition,” says Dr. Joslin.

Common health complications linked to obesity include:

Arthritis and other joint problems
Diabetes
Heart disease
High blood pressure
Respiratory issues
Decreased liver function
Cancer
Increased surgical and anesthetic risks
Lowered immune function
Pancreatitis
Kidney disease

Extra weight also makes everyday activities—like walking, playing, or even standing up—more uncomfortable and physically taxing, directly lowering your dog’s quality of life.

What Causes Dog Obesity?

Dog obesity rarely happens overnight. It’s usually the result of multiple factors leading to more calories consumed than burned.

Key contributors include:

Overfeeding: “Overfeeding is typically the primary cause of obesity,” says Dr. Joslin. “Dogs who consume more calories than they expend will gain weight, regardless of activity level.”
Excessive treats: Table scraps and treats add hidden calories. Treats should make up no more than 10% of your dog’s daily diet.
Lack of exercise: Insufficient movement slows metabolism and contributes to muscle loss, making weight gain easier.
Breed predisposition: Some breeds are genetically more prone to weight gain due to slower metabolism or high food motivation.
Aging: As dogs age, metabolism slows and activity often decreases—increasing susceptibility to weight gain.
Neutering/spaying: These procedures can slightly reduce metabolic rate in some dogs.
Medical conditions: Hypothyroidism, Cushing’s disease, and certain medications (like steroids) can disrupt metabolism and hormone balance, leading to weight gain.

Dog Breeds Prone to Obesity

While any dog can become overweight with poor diet and inactivity, certain breeds are genetically predisposed. According to research, higher-risk breeds include:

Cocker Spaniel
Labrador Retriever
Dalmatian
Dachshund
Rottweiler
Golden Retriever
Shetland Sheepdog
German Shepherd
Shih Tzu
Poodle (Toy, Miniature, and Standard)
Beagle
Mixed-breed dogs

How Vets Treat Obesity in Dogs

“Obesity in dogs is treated with a reduced-calorie diet and increased activity,” says Dr. Elizabeth Benson, DVM, founder of Paws into Grace and FurPetVo veterinary advisor. “But first, we rule out underlying diseases—like hypothyroidism—that can cause weight gain.”

If a medical condition is identified, it must be addressed alongside dietary and lifestyle changes.

Veterinarians may recommend:

Reducing portion sizes
Switching to a therapeutic weight-management diet
Tailoring exercise plans—from longer walks to low-impact options like swimming—based on your dog’s age, breed, and mobility

A senior Labrador Retriever walking comfortably beside its owner on a shaded neighborhood path, wearing a lightweight harness

How To Help Your Dog Lose Weight Safely

Helping your dog shed excess weight doesn’t require drastic measures—it’s about consistency, balance, and veterinary guidance.

Switch to a Weight-Management Food

With your vet’s approval, transition to a complete and balanced weight-control food. These formulas contain fewer calories and added fiber to promote satiety—even with smaller portions.

Trusted options available at furpetvo.com include: