Overweight dogs are at an increased risk for health problems such as heart disease, diabetes, and joint pain.
There are many different weight loss diets available for dogs.
Feed your dog a consistent amount of food at regular intervals throughout the day.
Keep track of your dog's weight and body condition score.
Start slowly with short walks and gradually increase the duration and intensity of your dog's exercise.
Be patient. It takes time for dogs to lose weight.
The American Kennel Club has a section on dog obesity on their website.