Obesity is the most prevalent nutritional problem in domestic dogs in developed countries. It is estimated that between 25 and 40% of dogs in Spain are overweight or obese, figures that have increased in parallel with human obesity over recent decades. Far from being an aesthetic issue, excess weight has serious health consequences for the animal and significantly shortens its life expectancy.
How Is Obesity Diagnosed in Dogs?
The veterinarian evaluates the dog's body condition using the BCS (Body Condition Score) scale, which ranges from 1 to 9. A dog with a score of 5 is at its ideal weight: the ribs can be felt without seeing excess fat, and there is a visible waist when viewed from above. A score of 7-8 indicates overweight, and 9, severe obesity.
At home, a simple test is to run your fingers along the dog's ribs without pressing: they should be easily felt, like the knuckles of an open hand. If you have to press to find them, the dog is probably overweight.
Causes: Beyond "Eats Too Much"
Although the imbalance between calories consumed and expended is the immediate cause, several factors predispose dogs to obesity:
- Neutering: reduces basal metabolism by 20-30% and decreases the feeling of satiety. Neutered dogs need 20-25% fewer calories than intact dogs.
- Breed: Labrador Retriever, Beagle, Cocker Spaniel, Basset Hound and Rottweiler have a greater genetic predisposition to accumulate fat.
- Age: metabolism decreases with age; senior dogs need fewer calories.
- Hypothyroidism: an uncommon cause but one that should be ruled out in dogs with obesity resistant to dietary treatment.
- Hyperadrenocorticism (Cushing's): causes fat redistribution and increased appetite.
- Incorrect feeding: exceeding recommended portions, too many treats and human food scraps.
Health Consequences
A Purina study published in the Journal of Veterinary Internal Medicine showed that dogs maintained at their ideal weight lived an average of 1.8 years longer than their moderately overweight littermates. Pathologies associated with canine obesity include:
- Osteoarthritis: excess weight increases the load on already affected joints and accelerates cartilage degeneration.
- Type 2 diabetes mellitus: adiposity generates insulin resistance.
- Hepatic lipidosis: accumulation of fat in the liver that compromises its function.
- Cardiovascular disease: hypertension and increased risk of heart failure.
- Obstructive respiratory syndrome: especially serious in brachycephalic breeds.
- Higher anesthetic risk during surgical procedures.
Weight Loss Plan: How to Do It Right
Weight loss in dogs must be gradual (0.5-1% of body weight per week) and always supervised by a veterinarian. The key steps are:
- Quantify actual intake: many owners underestimate the amount of food they give. Measure with a measuring cup and count all treats.
- Choose a weight control food: lower energy density, higher fiber and protein content to maintain muscle mass while losing fat. Veterinary prescription diets (Hill's Metabolic, Royal Canin Satiety, Purina OM) are more effective than commercial light foods.
- Divide the ration into 2-3 daily meals: reduces hunger and stabilizes blood glucose.
- Increase exercise gradually: longer walks, active play. In dogs with arthritis, swimming or hydrotherapy are low-impact options.
- Regular check-ups: weigh the dog every 2-4 weeks at the clinic to adjust the diet according to response.
Guilt-Free Treats: Healthy Alternatives
Eliminating treats completely is difficult and can affect the emotional bond. There are low-calorie alternatives: pieces of carrot, cucumber or apple (seedless) are well tolerated by most dogs and represent a fraction of the calories in commercial snacks. Treats should never exceed 10% of total daily caloric intake.
