How to Tell If Your Dog Is Overweight (And What to Do About It)

Dog obesity is one of the most common — and most preventable — health problems vets see today. Carrying extra weight significantly shortens a dog’s life and affects their quality of daily living. Here’s how to assess your dog’s weight honestly and what to do if they’ve gained too much.

The Rib Test

The simplest at-home assessment: place both hands on your dog’s ribcage and press gently. You should be able to feel individual ribs without pressing hard, like feeling your knuckles through a thin blanket. If you have to press firmly to feel ribs at all, your dog is likely overweight. If ribs are immediately visible without touching, they may be underweight.

The Waist and Tuck Check

Looking down at your dog from above, they should have a visible narrowing at the waist — an hourglass shape. Looking from the side, the belly should tuck upward between the ribcage and the hind legs. A dog that looks like a tube from above, or whose belly hangs level or droops, is carrying too much weight.

Health Risks of Excess Weight

Overweight dogs are at significantly higher risk for joint disease and arthritis, diabetes, heart disease, breathing difficulties, and certain cancers. They’re also harder to anaesthetise safely if surgery is ever needed. Studies consistently show that lean dogs live 1.5–2 years longer than their overweight counterparts.

How Dogs Gain Too Much Weight

The most common culprits are overfeeding (portions that are too large), too many treats, insufficient exercise, and free-feeding (leaving food out all day). Spaying and neutering also slightly reduces metabolic rate. Certain medical conditions like hypothyroidism or Cushing’s disease can cause weight gain — worth ruling out with a vet if weight gain is sudden or unexplained.

A Safe Weight Loss Plan

Never drastically cut a dog’s food without veterinary guidance. A safe rate of weight loss is 1–2% of body weight per week. Your vet can calculate the right daily calorie intake. Transition to a weight management food if needed, measure portions precisely with a scale (not a cup), eliminate or strictly limit treats, and increase exercise gradually.

Exercise That Works

For overweight dogs, start slowly — overexertion in dogs with extra weight puts strain on joints and the heart. Begin with two 15-minute walks daily and build from there. Swimming is excellent as it’s easy on joints. Interactive play sessions at home also burn calories without high impact.

When to See a Vet

If your dog is significantly overweight, has gained weight rapidly, has joint pain, is struggling to breathe, or hasn’t responded to diet adjustments after a month, see your vet. They can rule out medical causes, recommend prescription weight loss diets, and monitor progress safely.

The goal isn’t perfection — it’s a healthier, more comfortable, more active life for your dog. Every step toward a healthier weight is a step toward more years together.