How Long Do Pigs Live? Pet Pig and Farm Pig Lifespans

Author: Elliott Garber, DVM

A pet pig usually lives 10 to 15 years. That is the figure both editions of the Merck Veterinary Manual settle on for potbellied and other miniature pet pigs. Farm pigs are a different question with a different answer: a market hog reaches slaughter weight at around six months, and a breeding sow’s working life is counted in litters rather than birthdays. This guide gives you both. If you are still deciding, the Creatures pig hub is the place to start.

What changes how you keep a pig is not the range. It is that almost everything shortening a pet pig’s life is a slow trend rather than an event: a body condition that drifts up over three years, a hoof that grows a few millimeters past where it should be, a tusk nobody trimmed. Pigs rarely crash the way small pets do. They wear out.

So write down the birth date and start weighing. A free pig profile on Creatures holds the birth date, a running weight history, trim dates, and vaccination records in one place, which is what a veterinarian needs and almost no pet pig arrives with.

How long do pet pigs live?

The two most-quoted ceilings on the internet come from the same publication. Merck’s pet owner edition states that potbellied pigs may live from 8 to 25 years, with a life span of 10 to 15 years common in healthy pigs. Merck’s professional edition, written for veterinarians by a different author, gives about 8 to 20 years, typically about 10 to 15. Same manual, two documents, two ceilings, and this guide reports both rather than averaging them into a number neither one states.

Both editions attach the same caveat, and it is the useful part: obese or unusually small pigs are likely to have shortened life spans. The two conditions most likely to turn a fourteen-year pig into an eight-year pig are the two the pet pig market manufactures.

The size question decides most of the rest

There is no teacup pig. The Merck Veterinary Manual’s professional edition puts it flatly: the term teacup pig has no strict definition. Neither does micro, nano, or pixie. They are sales words attached to ordinary miniature pet pigs, which are themselves a mixed population rather than one breed: as potbellied pigs grew popular, less cautious breeding crossed them with other miniature swine and even with larger commercial pigs, so today’s pet pigs vary far more in size and shape than the originals.

Two facts about growth explain how buyers get surprised. Miniature pigs rarely reach full size until they are two to three years old. And pigs can be bred as early as three months old, so a seller can show a buyer a small mother and imply the piglets will stay that size, when the mother herself is not finished growing. That pattern is named directly in the professional edition, which calls the breeders who use it unscrupulous.

The numbers give you something to hold a seller to. In the Con and Lea potbellied lines, a pig at one year old should stand no more than 46 cm at the withers, about 18 inches, and weigh no more than 43.2 kg, about 95 pounds. In practice, Merck records that miniature pet pigs commonly weigh 45.5 to 68.2 kg, which is 100 to 150 pounds, and can weigh more. Its pet owner edition adds that most mature potbellied pigs average under 200 lb, against a domestic farm hog that can pass 1,000 lb.

Here is the part that belongs in a lifespan guide rather than a buying guide. Mature size, Merck states, is heavily influenced by adequate nutrition, and when pigs are selected for smaller size, nutritional stunting arrives alongside a list of magnified genetic problems: hypoglycemia, idiopathic seizures, musculoskeletal deformities, heart disease, cleft palate, atresia ani, and reproductive problems including dystocia and agalactia. Read that next to “very small pigs are likely to have a shortened life span” and the mechanism stops being mysterious. A pig kept small by underfeeding is starved through the years it is supposed to grow, and a pig bred small by selecting the smallest animals carries a heavier load of inherited defects.

If a seller guarantees a precise tiny adult weight, that is a claim no honest breeder can make, because the pig will not finish growing for another two or three years.

What actually shortens a pet pig’s life

Weight

Obesity is the central pet pig problem, and Merck’s professional edition traces the chain without hedging: if a balanced diet is not maintained, the condition will lead to joint disease, lameness, and pain. The pet owner edition adds that overweight pigs are likely to become lame and develop problems such as diabetes, and that the best way to prevent or lessen degenerative arthritis is to prevent obesity and get weight off pigs already carrying it. It also becomes self-sustaining: even on restricted calories, Merck notes, weight loss is difficult, because an obese pig moves so little that it burns almost nothing, and lameness limits exercise further.

At the far end, Merck’s professional edition carries a photograph of a morbidly obese miniature pig with the note that the folds of fat obscuring its vision could lead to blindness accompanied by nervousness and irritability. A pig that cannot see its handler coming reads as a pig that has turned unpredictable, and owners rarely connect the two.

The practical instruction from that page is one most owners have never heard: avoid feeding pigs from bowls. Every meal should require foraging, from a foraging box, a food-dispensing toy, or feed scattered across the grass.

Feet and tusks

A pig’s hooves grow throughout its life. Exercise on abrasive surfaces such as concrete wears them down; for a pig living indoors or without that, hoof trimming should be provided on an annual basis or more frequently if required. Why this is a longevity item and not a grooming one is spelled out in Merck’s professional edition: overgrown nails cause an abnormal gait with the feet hyperextended, which puts abnormal stress on the joints, causing pain and eventually joint disease.

Permanent canine teeth, the tusks, erupt at about five to seven months and grow continuously. The two editions give slightly different schedules and both are worth knowing: the pet owner edition says trim first at about one year of age and then annually, while the professional edition says the canines may need cutting every 6 to 12 months. Left long they cause malocclusion and pain and can injure people, and sedation or anesthesia is required either way.

Older pigs have mouths worth watching. Geriatric pet pigs may have abscessed or exposed tooth roots, Merck records, and swelling followed by a draining tract at the angle of the jaw points to a canine tooth abscess. A pig that goes off food or grinds its teeth deserves an oral examination under sedation, not a wait-and-see week.

Skin

Dry, flaky, itchy skin occurs in virtually every pet pig, and Merck’s advice is deliberately low-key: wipe the skin with a wet towel weekly rather than bathing, which can worsen flaking. Two skin problems are not cosmetic, though. Sarcoptic mange is the most common parasitic disease of pet pigs and it transmits to people, which is why newly acquired pigs are routinely treated even when they show no signs. Melanoma is an important skin tumor in swine, so any suspected tumor should be removed and evaluated, though Merck notes that melanomas occasionally regress on their own and that affected pigs usually live normal life spans.

The urinary tract and the kidneys

Cystitis and urolithiasis are common in pet pigs of both sexes, and a pig that cannot urinate is an emergency. Watch for frequent urination, straining, and blood in the urine, often with vocalizing. Routine urinalysis belongs in the annual examination, Merck says, precisely because catching this early is what prevents the surgical version. Urinary disease belongs in a lifespan guide because of what comes at the end: chronic kidney disease is a common cause of death in geriatric pet pigs, showing as lethargy, loss of appetite, dehydration, and ammonia-smelling breath, and the pet owner edition is blunt that it is ultimately untreatable and fatal.

Heat, water, and the house itself

Pigs have only a limited number of functional sweat glands. Merck puts adult comfort at 65 to 75 degrees Fahrenheit, calls temperatures above 85 stressful, and warns that extended heat plus humidity can be fatal, so a wallow, shade, moving air, and cool surfaces are the tools. It also names the trap: a pig with no other way to cool off will upend its own water bowl to make a wallow and be left without drinking water, one route to salt toxicosis. Indoors, the injuries Merck lists as most common are intestinal problems from swallowed objects and fractures from jumping off furniture. Ramps instead of steps, furniture off limits, and a floor clear of anything a pig can get in its mouth.

Spaying and neutering change the odds

On the female side, Merck’s professional edition is direct: early spaying decreases the risk of ovarian cysts, uterine tumors, and cystic endometrial hyperplasia. Those masses get big enough to distend the abdomen, at roughly 9.1 to 13.6 kg, which is 20 to 30 pounds, and vulvar bleeding can signal a uterine tumor and can be life threatening. Most can be removed surgically, but they can be invasive enough to cause death or require euthanasia if they are not removed promptly. Both editions put the ideal spay window at four to six months; males are neutered at about eight to twelve weeks, and the pet owner edition states plainly that intact males do not make suitable pets.

There is a behavior clock here too, and it ends more pet pig relationships than any disease. At approximately two years of age, Merck records, many healthy potbellied pigs develop a more assertive personality and challenge other pigs or people for rank, an aggressive 100-pound pig can genuinely endanger adults as well as children, and this is the stage at which many pigs are abandoned or placed in animal shelters. The professional edition names the same outcome from the clinical side: failure to manage that behavior appropriately is a common reason pet pigs are placed in rescue operations or abandoned.

Nobody has published reliable figures on how many pet pigs are given up, so treat any confident percentage with suspicion. What the literature says is that it is common and largely preventable, through early neutering, an enriched environment, harness and leash training from a young age, and rewarding the behavior you want. Punishment, Merck notes, tends to make a pig fearful of the person delivering it and more aggressive rather than less.

Finding a vet before you need one

Veterinary access is a real longevity variable here, and Merck says so in the first line of its routine care page: locating a veterinarian with experience in caring for potbellied pigs may be difficult. Few small animal veterinarians have thorough training in pet pigs, and livestock veterinarians may not be trained in them either, or may not be conveniently located. That is a caseload and logistics problem rather than a knowledge failure on anyone’s part, and the fix is the same either way: find the practice before the emergency. Both of our finder guides help from opposite directions: how to find a large animal vet covers farm-call practices and names pet pigs directly, and how to find an exotic vet covers the screening call for any practice whose species list is thin.

The manual’s own suggestion is to start with your state veterinary medical association, most of which run an online referral service, then call each candidate and ask directly whether they have experience and training with pet pigs. A veterinarian who is not comfortable taking a pig will usually refer you to someone who is. The same page recommends an examination before purchase, or a written agreement allowing return if a prompt examination finds the pig unhealthy, plus any records the previous owner holds: the first visit sets a baseline that becomes valuable if problems develop later.

Zoning is a lifespan issue too

A pig rehomed because of a rule nobody checked is a pig whose expected lifespan just changed, which is why this belongs before a purchase rather than after it. Most zoning ordinances classify potbellied pigs as livestock rather than pets, Merck records, so in many urban and residential communities they are banned from residential property, and owners are advised to check local zoning regulations before acquiring one. The same page adds that pet pigs are not suitable for apartments or high-density condominium complexes.

Rules vary by city, county, and state and they change, so the only reliable answer is your own municipality’s ordinance, in writing, before you buy.

How long do farm pigs live?

Market pigs are harvested young. Penn State Extension’s farrow-to-finish description gives about six months from birth to a market weight of roughly 280 pounds, inside a full production cycle of about ten months including breeding and gestation. The current national average is close: USDA’s National Agricultural Statistics Service reported that in 2025, US commercial hog slaughter totaled 128 million head with an average live weight of 289 pounds.

Breeding females stay longer, but not as long as most people assume, and the industry counts them in litters rather than birthdays. A 2020 review in Porcine Health Management reports that across North America, Japan, Sweden, and Spain, the mean parity at removal varies between 3.3 and 5.6. The same authors immediately caution that parity at removal is a poor longevity measure because it ignores how many days a sow actually lived, and give better numbers: mean herd-life days, from first mating to removal, range from 467 to 969 across the US, EU, and Japan, and mean sow life days, from birth to removal, range from 992 to 1,088 in the EU and Japan. That last figure is the one to hold onto, and it works out to roughly 2.7 to 3 years of life.

Why sows leave is not mysterious. An earlier analysis in the Journal of Swine Health and Production records US breeding herd replacement rates averaging near 50 percent, average herd parity of culled sows of 3.1 to 3.7, and a break-even point of three parities for a replacement gilt. A review in GeroScience puts the biology alongside the economics: pigs are commonly euthanized before reaching 10 percent of their possible lifespan, and lameness and joint conditions are among the most prevalent disorders in the species, driven partly by rapid weight gain. Even at one to two years old, osteoarthritis and lameness are major factors influencing production and culling. That review reaches the same conclusion for the farmed ruminants, and our cattle lifespan, goat lifespan and sheep lifespan guides each answer the production question and the pet question separately, as this one does.

That review takes its species ceilings from the AnAge database, which lists a maximum longevity of 27 years for Sus scrofa. Read that carefully before repeating it: the record rests on one captive specimen of a wild Ryukyu subspecies rather than a domestic pig, and AnAge’s own note is that domestic pigs are mostly slaughtered long before reaching their maximum lifespan. It is a ceiling for the species, not a target for yours.

The record that makes the difference

Almost every lever above is a trend, and a trend needs dates attached to numbers:

• Birth date. Everything keys off it: when tusks erupt, when full size should be reached, when a pig counts as geriatric. Get it in writing at purchase, because it is the one fact you cannot reconstruct later.
• Weight, on a schedule. Monthly through the growing years, then whenever body condition looks like it is drifting. A monthly number shows a trend a glance never will.
• Hoof and tusk trims. Annual jobs for most pigs, usually needing sedation, and easy to let slide by a year.
• Vaccinations and boosters. Merck’s pet owner schedule starts at or after four weeks with a second dose three to four weeks later and boosters every 6 to 12 months. Erysipelas appears in every combination it lists, tetanus in most of them.
• Every visit, test, and treatment, annual urinalysis results in particular.

A Creatures pig profile holds all of that: vaccination records with an administered-by field and a next-due date, examination and test result entries, weight and body condition over time, and reminders you can subscribe to as a calendar feed. Medical record types are private by default. Before a visit you can download a printable packet to bring to the clinic, and afterwards import the clinic’s PDF straight back into the record. See adding a record, health and medical records, and reminders and upcoming care.

Pig lifespan FAQ

How long do teacup pigs live?
There is no teacup pig, so there is no separate lifespan for one. A pig sold as teacup is a miniature pet pig, and if it genuinely stayed tiny that is a warning rather than a feature: Merck says very small pigs are likely to have shortened life spans, and that selecting for small size magnifies inherited problems alongside nutritional stunting.

Do pet pigs live longer than farm pigs?
Yes, by a wide margin, but the comparison is about management rather than biology. Market pigs go to slaughter at around six months and breeding sows average roughly 2.7 to 3 years from birth to removal. Most of the difference is culling, not aging.

What do old pet pigs usually die of?
Merck’s professional edition names pain from chronic arthritis, secondary to poor hoof care, poor conformation, or obesity, as a common reason geriatric pet pigs are euthanized, and chronic kidney disease as a common cause of death. It also notes that a properly vaccinated and well-cared-for pet pig rarely dies of infectious disease.

Do this next on Creatures

If you own a pig. Create a free profile and record the birth date, weights, and trim dates: add your pig (no account needed to start). Then log weights, vaccinations, and vet visits with add a record, which opens for visitors and needs a free account to save. Help center: adding an animal and what each profile tab does.

If you are still looking for a pig. Read the cost guide first, compare breeds such as the Juliana and the Yucatan miniature, then browse the pig marketplace or set an alert so you hear when one appears near you: get pig listing alerts. See saving searches and using your watchlist.

If you breed or rescue pigs. Honest size and age records are the whole argument for buying from you. Get listed where owners are already searching in the breeder and rescue directory, and create your organization profile to publish your animals, records, and available litters under one name. Help center: getting listed in the breeder directory. Planning a litter? The pig gestation guide has the dates.