If your Labrador seems hungry all the time and gains weight no matter how carefully you feed it, the problem may be written into its DNA. Research published in the journal Cell Metabolism found that many Labrador Retrievers carry a variation in a gene called POMC, and that this variation is linked to both greater food motivation and a higher tendency to carry extra body fat. In other words, the dog is not being stubborn or sneaky. Its biology is telling it to eat whenever food is available.
This is one of the clearest examples in any animal of a single gene influencing appetite and body weight. It also helps explain why “just feed it less” is harder for some Labs than others. The dog’s internal hunger signals are genuinely stronger.
Why Do Labs Get Fat Its Written In Their Genes?
The short answer is that a specific stretch of DNA affects how the Labrador brain regulates hunger. A 2016 study in Cell Metabolism, led by researchers at the University of Cambridge, examined hundreds of Labradors and flat-coated retrievers. The team found that dogs with a particular change in the POMC gene scored higher on measures of food motivation and were more likely to be overweight.
POMC stands for pro-opiomelanocortin. In the brain, it is part of a system that helps signal satiety, the feeling of being full. When that signal is weaker or less efficient, a dog may not register fullness the same way another dog would. The result is a dog that keeps looking for food even after a full meal.
Importantly, the study found an association, not a guarantee. Not every Lab with the gene variant is overweight, and not every overweight Lab carries it. Genes shift the odds. They do not write a fixed outcome. Feeding, exercise, and the dog’s environment still matter a great deal.
How Common Is This Gene Variant in Labradors?
It is common. In the Cambridge study, roughly a quarter of the Labradors tested carried at least one copy of the POMC variant. The pattern was less consistent in flat-coated retrievers, which suggests the effect is not identical across all retriever breeds.
Because the variant appears so often in Labradors, it likely spread through the breed over many generations. A dog that is highly motivated to find food may have had a survival advantage in the past, when meals were unpredictable. The same trait becomes a liability in a modern home where food is always available and portions are controlled by people.
This is a useful thing to understand. The trait is not a defect that appeared recently. It is part of the breed’s history, and it is now colliding with an environment of plenty.
Does the POMC Gene Affect Labrador Behavior Too?
Yes. The same study linked the gene variant to behavior, not just body weight. Dogs with the variant showed stronger interest in food, more begging, and greater persistence around meals. Owners often describe these dogs as obsessed with food.
That behavior is the visible side of the biology. A dog that feels less full will naturally pay more attention to anything that might be edible. It may raid counters, scavenge on walks, or stare at the family during dinner. These are not signs of a badly trained dog. They are signs of a dog whose appetite system is set differently.
This matters for how owners respond. Punishment or restriction without a plan tends to backfire. The dog is not misbehaving on purpose. It is following a strong internal signal.
Is It Only Labradors That Carry This Trait?
No, but Labradors are the best-studied example. The POMC gene and the appetite system it belongs to exist in many mammals, including humans. Variations in this general pathway have been studied in people as well, where they can influence appetite and weight regulation.
What makes Labradors stand out is how common the variant is within the breed and how consistently it shows up in studies. Other breeds may have their own genetic factors affecting weight. Obesity in dogs is a widespread problem across many breeds, and genetics is only one part of it.
It is also worth noting that breed stereotypes can mislead. A thin Labrador is not necessarily healthier than a heavier one by default, and a heavier one is not automatically the victim of its genes. Body condition, not breed reputation, is what veterinarians actually assess.
What Actually Helps a Food-Obsessed Labrador?
Understanding the genetics does not remove the need for management. It just explains why management has to be deliberate. A dog with a strong appetite drive needs structure more than willpower from its owner.
Veterinarians generally focus on a few practical areas. Measuring food with a scale or a consistent scoop instead of eyeballing it. Limiting table scraps and treats, which add up quickly and are easy to lose track of. Keeping the dog at a healthy body condition, which a vet can assess by feeling the ribs and checking the waist. And building in regular activity appropriate to the dog’s age and health.
One point that is often missed: treats count as calories. Many owners cut the main meal but keep handing out biscuits and chews throughout the day. The dog may still be taking in more energy than it needs. Tracking everything the dog eats, not just its bowl, is usually the step that makes the difference.
If a dog is gaining weight despite careful feeding, that is a reason to see a veterinarian. There are medical conditions, separate from genetics, that can affect weight and appetite. A vet can rule those out and help build a realistic plan.
Does Knowing the Gene Change Anything for Owners?
It changes the mindset more than the method. Owners who understand that their Lab’s hunger is partly genetic tend to stop blaming themselves and stop expecting the dog to self-regulate. That is a more realistic starting point.
It also reframes the goal. The aim is not to make a food-obsessed dog stop caring about food. That is unlikely to happen. The aim is to manage the environment so the dog’s strong drive does not translate into excess weight. Consistent portions, fewer free calories, and regular activity do most of the work.
There is no gene therapy for this in dogs, and no diet that switches the trait off. What exists is a clearer understanding of why the dog behaves the way it does. That understanding, paired with steady management, is what actually helps.
Frequently Asked Questions
Is there a gene that makes Labradors hungry all the time?
Yes. A variant in the POMC gene has been linked to stronger food motivation in Labradors. Research published in Cell Metabolism found that dogs with this variant were more food-focused and more likely to be overweight.
Can a Labrador with this gene still stay at a healthy weight?
Yes. Carrying the gene variant raises the tendency toward weight gain but does not make it inevitable. Careful portion control, limited treats, and regular exercise can keep an affected dog at a healthy body condition.
Do all overweight Labradors have the POMC gene variant?
No. The gene is one factor among several, and many overweight dogs do not carry it. Diet, activity level, age, and other medical conditions also affect body weight.
Should I feed my food-obsessed Labrador less?
Feed to a measured amount based on your veterinarian’s guidance rather than guessing, and account for treats. Cutting food too aggressively without professional advice can leave a dog undernourished, so it is best to set portions with your vet.
