Why Labradors Gain Weight So Easily (And What Actually Works)

If you own a Labrador and mealtime feels like a performance, you're not imagining it. Labradors are consistently one of the breeds most likely to carry extra weight, and for a real share of them, it isn't a training problem. It's genetic.

The gene behind the begging

A 2016 study published in Cell Metabolism found that around 1 in 5 Labrador Retrievers carries a variant in a gene called POMC, which plays a direct role in regulating appetite and how full a dog feels after eating. Dogs with this variant are, on average, measurably hungrier and prone to gaining more weight. Flat-Coated Retrievers, a close relative, carry the same variant. This isn't a loophole for skipping portion control, it's the opposite: if your Labrador's hunger signal genuinely can't be trusted to self-regulate, weighed portions matter more for them than for almost any other breed.

How much more likely is a Labrador to be overweight?

UK veterinary records analysed by Pegram et al. (2021) found Labradors are about 1.7 times as likely to be overweight as crossbred dogs. That's a substantial gap, and combined with the POMC finding, it points to the same conclusion: genetics load the dice for this breed in a way that willpower alone doesn't fix.

What the research says about doing something about it

The most direct evidence on Labradors and weight comes from a landmark 14-year trial by Kealy et al. (2002): 48 Labrador littermates were split into pairs, with one dog in each pair fed 25% less than its sibling across their entire lives. The leaner dogs lived a median of 1.8 years longer, and showed delayed onset of chronic disease, including osteoarthritis, which Labradors are already predisposed to in their hips and elbows. This is one of the strongest pieces of evidence in veterinary nutrition that a Labrador's weight is genuinely within an owner's control, and that controlling it pays off.

What actually works for this breed specifically

• Weigh every meal in grams. A "cup" is far too imprecise for a dog whose hunger cues are already working against accurate self-regulation. A kitchen scale removes the guesswork entirely.
• Split the daily allowance into puzzle feeders or scatter feeding. Labradors are food-motivated enough that this becomes genuine enrichment, not just a diet trick, and it slows down a breed known for eating fast.
• Treat the whole household as part of the plan. A Labrador that's hard to resist is a Labrador that gets fed from multiple directions. Agreeing on a single daily allowance, treats included, matters more here than for breeds that self-regulate better.
• Re-weigh every two weeks, not once a month. Given how quickly intake can creep for this breed, catching drift early is easier than correcting it later.

The bigger picture

A Labrador that seems endlessly hungry isn't being difficult, there's a real biological reason some of them are wired that way. The fix isn't willpower, it's structure: weighed food, a single household-wide plan, and regular re-weighing. Given what the Kealy trial showed about lifespan, it's also one of the more clearly worthwhile things you can do for this particular breed.

Get a calorie target and weighed portions built for your own Labrador's age, activity and desexed status with the free 60-second check, or see their full weight and calorie chart.