How to Help an Overweight Dog Lose Weight Safely

By Tailwisp Editorial TeamUpdated October 17, 20263 min read

More than half of pet dogs are overweight, and many owners do not realize it. Extra weight shortens life, worsens arthritis and raises the risk of diabetes and other diseases. The good news is that dogs respond well to a sensible plan.

Start with the vet

Book a checkup before beginning. Your vet will confirm that the weight is a problem, check for medical causes such as hypothyroidism or Cushing's disease and assess any joint problems that affect exercise. They will help you set a target weight and a calorie plan. See our guide to dog obesity risks.

Assess body condition

Use the body condition score chart to judge whether your dog is overweight. You should be able to feel the ribs under a light layer of fat, and see a waist from above. If you cannot, there is excess weight to lose.

Set a target

Your vet can estimate an ideal weight based on body condition. Weight loss is usually planned over months. A common goal is to lose about one to two percent of body weight per week. Faster loss risks muscle loss and nutrient deficiency.

Calculate calories

Use the resting energy requirement for the target weight, multiplied by a factor of about one, as a starting point for weight loss. See our guide to how many calories a dog needs. Your vet may adjust this.

Choose the right food

Simply feeding less of a regular diet can leave your dog short of protein, vitamins and minerals. Weight-management diets are designed to provide complete nutrition with fewer calories, often with more fibre and protein to improve fullness. Your vet may recommend a veterinary weight-loss diet. See our guide on fibre for dogs.

Measure everything

• Weigh food on a kitchen scale.
• Count every treat, chew and table scrap.
• Ask everyone in the household to follow the plan.
• Use part of the daily kibble as treats.

See our portion guide.

Treats

Choose low-calorie options such as small pieces of carrot or green beans, as long as they suit your dog. See can dogs eat green beans and healthy dog treats. Avoid fatty snacks, cheese and scraps.

Exercise

Increase activity gradually. Short, frequent walks, swimming and play help burn calories and maintain muscle. Overweight dogs and dogs with arthritis need gentle, low-impact exercise. See our guide to arthritis in dogs.

Feed in ways that keep dogs busy

Use puzzle feeders, slow feeders and snuffle mats to slow eating and add enrichment.

Monitor progress

1. Weigh your dog every two weeks, ideally on the same scale.
2. Record weights and body condition.
3. Adjust calories if weight loss is too fast or too slow.
4. Celebrate milestones with play, not food.

Troubleshooting

• My dog begs constantly. Use low-calorie fillers and distraction. Do not give in.
• Weight loss has stalled. Recheck portions and treats, and ask your vet.
• My dog is hungry all the time. Ask about a higher-fibre diet.

Maintenance

Once your dog reaches the target weight, increase calories gradually to maintain it. Keep monitoring.

Common mistakes to avoid

• Cutting food drastically, which risks muscle loss and nutrient shortfalls.
• Forgetting that treats, dental chews and scraps count.
• Letting different family members feed the dog without telling each other.
• Starting intense exercise too quickly with an overweight dog.
• Giving up after a plateau.

Involving the whole household

Write the daily plan on a card near the food container, and agree who feeds what. Explain to children that sharing food is not kindness for the dog. Offer love through walks, games and cuddles instead. Consistency from everyone is the biggest predictor of success.

The takeaway

Healthy weight loss is slow, steady and supervised. Measure food, cut treats, add gentle activity and keep going. Your dog will feel years younger.

This article is general educational information, not veterinary advice. Every dog is different. If your dog is unwell, or you are unsure about a symptom, diet change or medication, contact your veterinarian.