Male vs. Female Labradoodles: Does Sex Really Matter When Choosing a Puppy?

“We definitely want a girl,” a family tells us. “We’ve always heard females are calmer.”

A few weeks later, another family says almost the opposite: “We had a male years ago and he was the sweetest dog we’ve ever owned, so we only want a boy this time.”

Neither preference is wrong to have. But when it comes to male vs. female Labradoodles, the real question is whether sex actually predicts the personality families think they’re getting — or whether it’s mostly internet folklore dressed up as fact. The honest answer, backed by actual research on dog behavior: sometimes sex matters a little. Usually not in the way people expect.

Why People Develop Strong Male or Female Preferences

Before we get into what the research says, it’s worth acknowledging that these preferences come from somewhere real, and none of them are silly.

Some families had a beloved male or female dog growing up and simply want to recreate that experience — grief and nostalgia are powerful, legitimate reasons to lean one direction. Some have heard, from a breeder, a trainer, or a well-meaning neighbor at the dog park, that one sex marks less, or is more affectionate, or is easier around small children. Some are worried about aggression, or about managing an intact female’s heat cycle, or about how a new puppy’s sex will mesh with an existing dog already living in the house. Some are thinking about size, assuming one sex will simply be smaller and easier to manage. And some families just have a gut feeling — no story behind it at all, and that’s fine too.

What matters isn’t whether you have a preference. It’s understanding what that preference can and can’t actually predict about the puppy you bring home.

Is There Actually a Temperament Difference Between Male and Female Labradoodles?

There is some real research here, and it’s worth looking at honestly instead of leaning on stereotypes.

A large 2023 University of Helsinki study, published in the journal iScience, surveyed personality traits across more than 11,000 dogs spanning 52 breeds and breed groups. The researchers found that sex was statistically associated with nearly every personality trait they measured — but the effect sizes were consistently small. In practical terms, the study found that female dogs trended slightly higher on insecurity and training focus, while male dogs trended slightly higher on aggressiveness/dominance, dog sociability, and energy.

Here’s the sentence that matters more than any of those trends: population averages tell us very little about the specific eight-week-old puppy standing in front of you. A calm, easygoing male Labradoodle puppy can absolutely be more relaxed than a high-energy female from that exact same litter. Individual variation inside a litter is often larger than the average difference between the sexes across the whole study population. Breed, age, and early environment mattered far more in the Helsinki research than sex did — and the same logic applies directly to any male vs female Labradoodle comparison you’ll read online.

Are Male Labradoodles Calmer? Male Labradoodle Temperament, Explained

This is one of the most common questions we hear, and the honest answer is: it depends entirely on the individual dog, not on being male.

No responsible breeder should promise that a male Labradoodle will automatically be more affectionate, more laid-back, or more cuddly than a female from the same litter. Affection and calmness come down to a combination of genetics, individual temperament, early developmental experiences, how consistently good behavior gets reinforced, the puppy’s underlying confidence level, and how the household around them behaves. One puppy might constantly seek out physical contact and want to be touching you at all times. Another might happily settle three feet away, content just to be in the same room. Both of those puppies can be deeply, genuinely bonded to their people — independence is not the same thing as a lack of affection, regardless of sex.

Are Female Labradoodles Easier to Train? Female Labradoodle Temperament, Explained

Same story, different question. Training success has far more to do with motivation, reinforcement, focus, maturity, arousal level, handler consistency, and environment than with whether the puppy is female.

The Helsinki research did find a modest association between sex and training focus, with females trending slightly higher on that measure across the full population. But “slightly higher on average across 11,000 dogs” is a very different statement than “this specific female puppy will train more easily than her brothers.” It isn’t reliable enough to base an individual puppy choice on.

Here’s how we think about it from the breeder’s side: within any single litter, we’d pay far more attention to a specific puppy’s response to people, how quickly they recover after something startling, their baseline energy level, how engaged they get when a person actively tries to interact with them, and how they seem to process and learn new things — long before we’d ever weigh whether that puppy happens to be male or female. Those are the traits that actually predict how training sessions will go once that puppy is in your living room.

Size: Will Males Be Bigger?

This is one question where there’s a slightly more concrete answer, though it still comes with real caveats.

Across many dog populations, adult males do trend somewhat larger than females on average. But parental size and individual genetics matter tremendously — often more than sex alone. Take our current Bella and Dusty litter as a real example: it’s listed as a Medium-size litter with an expected adult weight range of 35–50 pounds, based on Bella and Dusty’s own history together, not a blanket “males will be big, females will be small” assumption. Within that same litter, there’s no guarantee the largest adult dog will be one of the males rather than one of the females. Using the parents’ size and the results of their previous related litters is a far more useful predictor than sex alone — you can see how we talk about this in more detail in our Labradoodle sizes and weights guide.

The short version: “male equals huge” is too simple an equation for a mixed breed where coat, structure, and size come from both a Labrador and a Poodle line, refined over generations. If size is a genuine deciding factor for your household — because of a small apartment, a lightweight family member who’ll be walking the dog, or simply a strong preference either way — ask specifically about that pairing’s history of adult sizes rather than defaulting to assumptions about sex.

Marking, Mounting, and Other Behaviors People Blame on Males

A lot of male-specific worry centers on a handful of behaviors that get unfairly pinned entirely on one sex. Worth clearing up directly:

Marking. This is commonly associated with males, but it isn’t exclusively male behavior — intact and even spayed females can mark too, especially in new or exciting environments.

Mounting. Also frequently misread. Mounting isn’t exclusively male, and it isn’t automatically sexual at all. It can show up as a response to excitement, general arousal, social interaction, stress, or plain old play between puppies of any sex.

Roaming. Hormones can play a role here, but management — secure fencing, supervision, leash habits — matters just as much as hormonal status.

We’re not going to make blanket claims here about neutering “solving” any of these behaviors, because that’s simply not a universal truth, and the right timing for spay or neuter surgery is a conversation to have directly with your own veterinarian, based on your specific dog.

What About Female Heat Cycles?

If you’re considering a female puppy and planning to keep her intact for any period of time, it’s worth understanding — in plain terms, not a full reproductive veterinary manual — what that involves. Intact females go through heat cycles roughly twice a year, during which they’ll need extra management to prevent an accidental breeding and some additional cleanup around the house. There’s no single universal timeline for when spaying makes the most sense; that decision depends on your individual dog, her health, and her breeder or veterinarian’s specific guidance. This is genuinely a conversation best had directly with your vet rather than settled by a generic online rule.

If You Already Have a Dog, Should You Get the Opposite Sex?

You’ll hear plenty of trainers and breeders recommend opposite-sex pairings in certain situations — and sometimes that’s genuinely good advice, particularly in households where two same-sex dogs have shown signs of tension over resources or attention in the past. But it isn’t a universal rule, and treating it as one can backfire. Whether a new puppy meshes well with your current dog depends far more on your existing dog’s individual temperament, age, social history, any resource-guarding tendencies, energy level, and the specific new puppy’s personality than it does on simply picking the opposite sex. Two confident, easygoing dogs of the same sex can get along beautifully for a lifetime. Two poorly matched dogs of opposite sexes can struggle just as much as any same-sex pairing might — the sex pairing is a minor variable next to how the two individual dogs are actually introduced, managed, and given time to build a relationship.

What I’d Look At Instead of Sex

If you take one practical list away from this whole article, make it this one. These are the things that actually predict whether a puppy will be a great fit for your household — far more reliably than male vs female Labradoodle stereotypes ever will:

• Overall temperament and general disposition
• Energy and arousal level
• Confidence in new situations
• How quickly the puppy recovers after something startling or novel
• Genuine interest in engaging with people
• Frustration tolerance
• Fit with your specific household — kids, other pets, activity level
• Expected adult size, based on parents and related litters
• Coat type and the grooming commitment that comes with it
• Sex preference — after you’ve weighed everything above

Notice where sex lands on that list. It’s a perfectly valid tiebreaker. It shouldn’t be the first filter.

When a Sex Preference Is Perfectly Reasonable

None of this means you have to abandon a sex preference — some situations genuinely call for one. A few honest examples: you already have a dog at home and a trainer has recommended a specific pairing for your particular situation; you have strong feelings about managing (or avoiding) heat cycles and reproductive management; you simply have a strong personal preference rooted in past experience; or there’s a real physical size concern in your household.

The message we’d want every family to walk away with: you don’t have to give up preferring one sex. Just don’t let that preference cause you to overlook a specific puppy who might actually be a far better fit for your family than the sex on their paperwork would suggest.

How Snowy River Approaches Puppy Selection

Rather than simply matching families to “a boy” or “a girl,” our process is built around getting to know the actual puppies first. Families who’ve placed a holding fee can visit the weekend after the puppies turn six weeks old to meet them, temperament testing is done during week seven, and puppies are chosen at the eight-week pickup appointment — after that testing and time together have given everyone a much clearer picture than a sex label alone ever could. You can see our current and upcoming litters, including sex, size, and coat details for available puppies, on our Nursery page, and get the full picture on how reservations and puppy selection work on our Purchase Info page.

Male vs. Female Labradoodle FAQ

Are male Labradoodles more affectionate? Not inherently. Affection depends on the individual puppy’s temperament, confidence, and how they’re raised — not on being male. Plenty of female Labradoodles are just as physically affectionate.

Are female Labradoodles calmer? Not reliably. Large-scale research shows only small, population-level associations between sex and traits like energy or insecurity — nowhere near enough to predict one specific puppy’s calmness.

Are males harder to potty train? No solid evidence supports this as a sex-based rule. House-training success depends on consistency, schedule, and the individual puppy’s maturity far more than sex.

Do male Labradoodles mark inside? Marking is more commonly associated with males, but it isn’t exclusive to them, and consistent house-training and management reduce it regardless of sex.

Are female Labradoodles easier to train? Research shows a small average association between sex and training focus, but it’s not strong enough to choose an individual puppy on that basis alone. Look at the specific puppy’s engagement and focus instead.

Are male Labradoodles larger? Males often trend somewhat larger on average, but parental size and individual genetics — not sex alone — are the better predictor for any specific puppy.

Which is better with children? Neither sex has a documented advantage here. Temperament, socialization, and how a specific dog was raised around kids matter far more than sex. Our guide on getting kids and Labradoodles on the same team covers what actually matters for family safety and fit.

Should my second dog be the opposite sex? Sometimes that’s a good approach, but it’s not a universal rule. Compatibility depends on your existing dog’s individual temperament and history far more than the new puppy’s sex.

The Bottom Line

Male vs. female Labradoodle differences are real in a population-level, statistical sense — and genuinely small in a way that matters far less than most puppy buyers assume. The specific puppy in front of you, their individual temperament, their energy, their confidence, and how well all of that fits your household will tell you far more than an “M” or an “F” on a pedigree ever could. If you’d like help thinking through what would actually fit your family — beyond simply asking for “a boy” or “a girl” — tell us about your household, your other pets, your activity level, and what you’re hoping for, and we’ll help you find the individual puppy who actually fits. You can reach out here or start browsing our current available puppies any time.