The two landmarks that settle it
A young Kunekune pig shows its sex in two places, and checking both prevents most mistakes. Lift the tail first: a female piglet has a small, slightly projecting vulva directly below the anus, while a male's rear is smooth there with only the anus. Then look along the belly: a male carries a sheath, a small tube of skin on the midline partway back, from which he urinates, and his belly may also show the small raised dot of the sheath opening. A female's belly is plain apart from two rows of teats, which both sexes possess, so teats alone never answer this question for a Kunekune or any other young pig.
Handling a piglet for a clear look
A young Kunekune pig objects loudly to being checked, and a screaming, twisting piglet hides exactly the landmarks you need. Work with a helper where possible: one person holds the piglet securely against their chest with its hindquarters supported and its belly accessible, while the other looks and feels. Keep the check short and return the piglet to its littermates promptly, because prolonged separation distresses both piglet and sow, who will be calling in response. Warm hands, a calm voice, and doing the check when piglets are already being handled for a health look reduce the drama. If the belly is muddy, which Kunekune piglets in an outdoor litter often are, wipe it clean first rather than guessing through the dirt.
Male development over the following weeks
A young Kunekune pig that is male becomes easier to confirm as he grows, because his testicles descend and become visible and feelable as two oval structures in a scrotum between his hind legs. In the earliest days they may sit less obviously, and a well-covered Kunekune piglet carries enough hair and fat over the rear that a glance is unreliable. Urination gives a supporting clue during normal pen watching: a male urinates forward from the belly sheath, while a female urinates backwards from under the tail as she squats slightly. If early checks disagree with each other, trust a repeat check a little later over forcing a verdict on day one, and mark the record as unconfirmed until the landmarks agree.
Why an accurate record matters early
A young Kunekune pig's sex shapes decisions sooner than many new keepers expect, including how littermates are grouped as they mature, which piglets are sold or kept, and what a buyer is told. Unplanned mixing of maturing males and females can lead to pregnancies nobody intended, because pigs mature earlier than their still-small size suggests. A wrongly sexed piglet passed to a new home creates problems for everyone, including the pig. Anyone selling or rehoming Kunekune piglets should be able to say how the sex was confirmed, not merely that the litter was assumed to be one thing or another based on size or behaviour, neither of which differs reliably between the sexes at this age.
Getting confirmation when you are unsure
A young Kunekune pig that resists a clear verdict deserves a proper second look from someone experienced, and your veterinarian can confirm sex during the litter's first health visit if your own checks conflict. Bring your notes on what you saw at each attempt, because a description of a belly sheath seen once and not again is useful information, not a failure. Once confirmed, write the sex down immediately against that individual piglet, ideally with a note of any identifying markings, since littermates look increasingly alike as they grow and a correct fact attached to the wrong piglet is no better than a guess. Storing that confirmed identity on KinsLe as part of the piglet's Pet Pass means this young Kunekune's basic details stay clear for grouping, sale, and veterinary visits.