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Kunekune Reproductive Structure

How to evaluate underlines, teats, external reproductive anatomy, breeding soundness, and long-term function

Kunekune Breeder Authority Guide

Understanding Reproductive Structure

Reproductive structure includes the external anatomy and supporting body design required for natural breeding, pregnancy, farrowing, nursing, and long-term herd productivity. It should be evaluated in every prospective breeding pig, not only after a problem appears.

Quick take: Select for normal, symmetrical reproductive anatomy; a useful, evenly spaced underline; sound feet and legs; adequate body capacity; and proven family fertility.
Kunekune breeding stock for sale at Dos Lobos Ranch near Dallas-Fort Worth Texas
The underline of Moneyshot, a breeding quality boarling from Ruby x Kai. He has a nice, straight row of 7 teats on the left and 7 teats on the right. Contrary to the popular saying, "Useless as tits on a boar hog," boars contribute to teat functionality in their daughters. Adequate teat counts, rail spacing, and complete, functional orifices are equally important on boars as well as gilts.

Why Reproductive Structure Matters

A pig can excel in breed type and muscling yet fail as breeding stock if it cannot mate naturally, carry a litter, farrow, or nurse piglets effectively. External structure is only one part of fertility, but it provides important early evidence.

Evaluate the Whole Breeding Animal

Feet, pasterns, rear legs, hips, movement, body condition, temperament, and mature size all influence reproductive function. A structurally compromised boar or sow may struggle even when reproductive anatomy appears normal.

Important: A visual exam cannot guarantee fertility. Use breeding records, litter data, semen evaluation when appropriate, and veterinary assessment for abnormalities.
Kunekune breeding stock for sale at Dos Lobos Ranch in North Texas
Boars may need a little bit of time to get the hang of things and figure it out. Kai eventually got the hang of it and has been a very fertile boar with lots of healthy litters for our farm.
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Ok, Kai needed a lot of time...

Key Features to Evaluate

Sow and Gilt Underline

Look for a sufficient number of functional, well-spaced teats extending along the underline, with accessibility for nursing piglets and no obvious defects.

Vulva and Female Development

External anatomy should appear normally developed and appropriate for age. Very small, infantile, injured, or abnormal structures warrant caution and veterinary guidance.

Boar Testicles

Both testicles should be present, normally descended, reasonably even, and free of obvious swelling, injury, or marked asymmetry.

Sheath and Prepuce

Observe placement, cleanliness, injury, and whether anatomy interferes with normal movement or breeding.

Common Concerns

  • Blind, inverted, damaged, or poorly spaced teats
  • Too few useful teats for expected litter size
  • Undescended, missing, markedly uneven, or abnormal testicles
  • External anatomy that appears immature, injured, or malformed
  • Unsound legs, extreme condition, or body design that limits mating
Kunekune boarlings and piglets for sale at Dos Lobos Ranch in Texas
Kai had a nice sized pair of well-descended, even testicles at an early age. He has transmitted the same to all of his boarlings. One thing we've noticed is that a good boar that passes on good reproductive structure makes for easier to castrate barrows! No excessive hunting for testicles, causing even more pain and distress on the piglet at castration.
Kunekune breeding sows and gilts for sale at Dos Lobos Ranch in Decatur Texas
A breeding boar we purchased and eventually culled. The day we picked him up, it was cold outside, so the boys were drawn inside and we could not inspect. Once we got him home and the weather warmed up, we discovered that he had one testicle that was not fully descended. You can see it here being significantly higher set on the right. Retained or partially retained testicles can mean reduced fertility and dead sperm.
Kunekune breeding stock for sale in Wise County Texas
A 3 month old gilt with a 7/6 teat line with 1 of the 7 being blind. You can see how small it is, how flat it is against the skin compared to the well developed ones to either side of it. Blind teats in boars do get passed on to his offspring. This technically makes her a 6/6 teat line.
Kunekune breeding quality pigs for sale at Dos Lobos Ranch in Wise County Texas
A sow that was sold to us as a breeding quality gilt that wound up with 2 blind teats on both rails for a total of 4. She struggled to feed her litter and they lagged behind.
Kunekune breeding stock for sale at Dos Lobos Ranch in North Texas
Here's the other side with 2 blind teats that wouldn't produced milk. It was really unfortunate because she was the best mother we've had to date who was very careful with her piglets. This was something that an experienced breeder should be able to catch in a piglet before selling it as breeding stock as reference in the photo above.

How to Evaluate Reproductive Structure

  1. Inspect piglets early and repeat the exam as they mature.
  2. Count and map teat placement on both sides of the underline.
  3. Check each teat for accessibility and obvious defects.
  4. Observe female and male anatomy for normal age-appropriate development and symmetry.
  5. Evaluate feet, legs, hips, movement, body capacity, and condition.
  6. Review the fertility, litter size, farrowing ability, mothering, and longevity of close relatives.
  7. Document concerns and seek veterinary evaluation before breeding an uncertain animal.
Record what you see. Clear notes and consistent photos help breeders compare development over time and avoid relying on memory at selection age.
Kunekune breeding quality piglets for sale at Dos Lobos Ranch in North Texas
A gilt with a decent sized vulva. I generally like the vulva on a young gilt to be a little bigger, but this one is fine.

Frequently Asked Questions

How many teats should a breeding Kunekune have?

Prioritize a sufficient number of functional, evenly spaced, accessible teats for the herd’s expected litter sizes. Quality and placement matter along with count.

Can normal-looking reproductive anatomy guarantee fertility?

No. It is an important screening tool, but fertility also depends on health, genetics, semen quality, cycling, behavior, management, and other internal factors.

When should reproductive structure be evaluated?

Begin in piglets, reassess before selection, and continue through maturity. Some concerns are visible early while others become clearer with development.

Why do feet and legs matter for breeding soundness?

Natural mating, pregnancy, farrowing, and herd movement place stress on the body. Unsound feet and legs can limit service ability and productive longevity.