---
title: Mini-Pig — Care & Reference Manual
author: codebuddy
type: manual
llm_refined: true
refined_by: kimi
manual_v2: true
date: 2026-08-04
source_topics: exotic_pet_profile_mini_pig_lifespan, exotic_pet_profile_mini_pig, exotic_pet_food_nrc_standard_map, exotic_nutrition_mini_pig_feeding_ratio, exotic_nutrition_mini_pig_feeding, exotic_pet_nutrition_mini-pig_safe_greens, exotic_nutrition_mini_pig, exotic_husbandry_mini_pig_handling, exotic_husbandry_mini_pig, exotic_life_stage_mini_pig, exotic_behavior_mini_pig, exotic_enrichment_mini_pig, exotic_grooming_mini_pig, exotic_breeding_mini_pig, exotic_health_mini_pig_teeth, exotic_tox_mini_pig_salt, exotic_pet_legality_crosswalk_mini-pig, evidence_exotic_mini_pig_clinical, evidence_exotic_mini_pig_husbandry_health, evidence_exotic_mini_pig_nutrition
source_hash: 3c940ac1e974cbf7
draft: false
---

# Mini-Pig — Care & Reference Manual

*LLM-refined manual (v2 pipeline, kimi, 2026-08-04; docs/MANUAL_V2_DESIGN.md).* This manual assembles the verified fact blocks in Pet Data Station that mention *mini-pig*, organised along a pet owner's journey. Every quoted fact is reproduced **verbatim** from its cited first-hand source (`[n]` superscripts; see References, each tagged with a computed trust grade per docs/topic_grading_guide.md) and is independently checkable. Guide sections (checklists, red-flag box) are orientation prose in which **every factual sentence carries its own `[n]`**; derived-summary blocks from non-Open-Access sources keep their *Paraphrased derived summary* mark. Mis-sectioned, duplicate, off-topic and image-residue fragments were removed by the v2 builder (build-gate enforced).

## Contents

1. [Species Profile](#species-profile)
2. [Life-Stage Care](#life-stage-care)
3. [Is this pet right for you?](#is-this-pet-right-for-you)
4. [Daily & Weekly Care Checklist](#daily-weekly-care-checklist)
5. [Nutrition](#nutrition)
6. [Husbandry](#husbandry)
7. [Behavior & Training](#behavior-training)
8. [Enrichment & Exercise](#enrichment-exercise)
9. [When to call a vet NOW](#when-to-call-a-vet-now)
10. [Health & Disease](#health-disease)
11. [Toxicology & Hazards](#toxicology-hazards)
12. [Grooming](#grooming)
13. [Breeding & Neutering](#breeding-neutering)
14. [Regulations & Legality](#regulations-legality)
15. [Appendix A — Commercial Food & Regulatory Notes](#appendix-a-commercial-food-regulatory-notes)
16. [Appendix B — Research Evidence](#appendix-b-research-evidence)

## Species Profile

The profile below records this species' taxonomy, natural origin and lifespan as documented in the cited reference.

### Miniature pet pig (Sus scrofa domesticus) — captive lifespan (pet care commitment)

*All lines in this block are paraphrased derived summaries — non-Open-Access source.*

> Mini pigs may live for up to 15 years and are a long-term commitment for any owner. [1]

### Miniature pet pig (Sus scrofa domesticus) — pet profile (behavior, housing, diet, reproduction, health)

*All lines in this block are paraphrased derived summaries — non-Open-Access source.*

> Miniature pet pigs (MPPs) are sensitive to temperature extremes and need a clean, dry, draft-free environment. [2]
> Outdoor access should include an area to root, since soil minerals benefit the pig. [2]
> MPPs may live outdoors, indoors or both, but must be acclimated to the specific setting. [2]
> Habituate MPPs to a harness and leash as early as possible, ideally while still very young and small, so they stay manageable. [2]
> In MPPs, first estrus can occur as early as 3 months of age in gilt piglets. [2]
> Older female MPPs typically show irritable behaviour for 2–3 days of estrus within every 21-day cycle. [2]
> MPPs can carry the same external and internal parasites as other swine. [2]
> Sarcoptic mange is the most common parasitic disease in pet pigs. [2]
> Permanent canine teeth emerge at about 5–7 months and grow continuously. [2]

## Life-Stage Care

Young, adult and senior care for this species, drawn from first-hand care pages and veterinary references.

### Mini Pig — life stage (owner-practical care, Merck Veterinary Manual pet-owner)

*All lines in this block are paraphrased derived summaries — non-Open-Access source.*

> Feed the recommended amount by body weight and age, split into 2 or more meals daily. [3]
> Many pigs are abandoned or surrendered at this stage. [3]
> Secure water dispensers to prevent spilling or chew damage. [3]
> Treat-free playtime reduces boredom and deters destructive behaviour. [3]
> Newly acquired pigs may carry mange mites not yet causing signs. [3]
> Permanent canine teeth erupt at 5–7 months. [3]
> Canine teeth should first be trimmed at about 1 year, then annually. [3]

> Feed life-stage formulated chow: a starter up to about seven weeks of age, a grower for roughly 8–16 weeks, and maintenance feed from greater than a year old; newborn piglets get milk replacer and starter until about seven weeks, then are weaned onto solid food. [4]

## Is this pet right for you?


- **Canine teeth grow continuously for life:** permanent canine teeth erupt at about 5–7 months and need trimming under sedation/anaesthesia, usually first at about 1 year then annually. [3] [2]
- **Many pigs are abandoned or surrendered**, so only take one on if you can commit to lifelong care. [3]
- **Sensitive to heat and cold:** miniature pet pigs are sensitive to temperature extremes and need a clean, dry, draft-free environment; pigs do not sweat, so temperatures above 29.5°C (85°F) stress adults. [2] [3]
- **They need room to root:** outdoor access should include an area to root, since soil minerals benefit the pig, and a spacious outdoor environment is enriching for both sows and piglets. [2]
- **Company matters:** inadequate opportunities for normal social interactions with other pigs may contribute to problematic behavior, so provide social contact. [2]
- **Territorial and can turn aggressive:** potbellied pigs are territorial, and around 2 years many healthy pigs develop a more aggressive personality and challenge others for status; an aggressive 100-pound pig can endanger children and adults, so neutering at 2–3 months helps avoid aggression. [3]
- **Not ideal around small children unless managed:** an aggressive 100-pound pig can endanger children and adults, and unneutered male pigs do not make good pets. [3]


## Daily & Weekly Care Checklist


Every day:

- **Balanced pelleted base diet:** a mini-pig's base diet should be a commercially available, nutritionally balanced pelleted chow formulated for mini-pigs, with vegetables and roughage and minimal fruit or other treats. [5]
- **Feed by weight and age, in meals:** feed the recommended amount by body weight and age, split into 2 or more meals daily. [3]
- **Make them forage:** make the pig forage for food at every meal and avoid feeding pigs from bowls. [6]
- **Fresh water always:** fresh water must be available at all times to prevent dehydration and salt toxicosis (water-deprivation sodium-ion poisoning). [7] [2]
- **Rooting and play outlet:** give a blanket to burrow under or a dirt box to satisfy the rooting need, and provide daily walks and play to reduce boredom and undesirable behaviour. [3]
- **Hazard check:** keep the living/play area free of swallowable objects to save the pig's life. [3]

Every week:

- **Nail trimming as needed:** most pet pigs need regular nail trimming to avoid overgrowth (frequency depends on the walking surfaces and the amount exercised). [2]
- **Refresh the rooting/dirt box:** change the dirt regularly and clean the box before refilling. [3]

Every year:

- **Vet preventive care:** a vet should give vaccinations, faecal worm checks, deworming, mange-mite treatment/prevention, and hoof/tusk trimming as needed. [3]
- **Canine teeth:** have canine teeth first trimmed at about 1 year, then annually. [3]


## Nutrition


The base diet is a commercially available, nutritionally balanced pelleted chow formulated for mini-pigs, plus vegetables and roughage with minimal treats; mini pigs easily gain weight, so a balanced high-fibre diet supports a healthy body weight and longevity. [5] Make the pig forage at every meal and avoid feeding pigs from bowls. [6]


The quotes below summarise this species' dietary requirements and nutrition-related disease risks, drawn from professional veterinary references.

### Mini-pig feeding ratio & meal frequency — VCA Hospitals (paraphrased)

> Divide the adult mini-pig's total daily ration into a minimum of 2–3 feedings; wild pigs eat about 7–11 small meals per day, so 2–3 daily feedings is the practical minimum for a pet. [4]
> Feed adult mini-pigs a daily total (pelleted ration plus other foods) of about 2% of body weight, roughly 1 cup of pelleted food per 23 kg (50 pounds) of body weight. [4]
> Feeding more than 2% of body weight risks obesity, arthritis and other health problems, so keep to the 2% guideline. [4]
> Offer pelleted mini-pig chow first at each meal so the pig eats a balanced ration, and feed vegetables, fruit and treats only in moderation. [4]

### Mini-pig feeding — balanced pelleted chow + veg/roughage, minimal treats; high-fibre for weight

*All lines in this block are paraphrased derived summaries — non-Open-Access source.*

> A mini-pig's base diet should be a commercially available, nutritionally balanced pelleted chow formulated for mini-pigs. [5]
> A balanced diet includes pelleted feed, vegetables and roughage, with minimal fruit or other treats. [5]
> Mini pigs easily gain weight, so a balanced, high-fibre diet helps maintain a healthy body weight and longevity. [5]
> Published nutrient requirements for production pigs are a useful reference but must be adjusted for pet mini pigs to prioritize longevity and healthy weight. [5]

### Mini-pig safe greens & vegetables — omnivore; pelleted chow base, veg/fruit supplement, harmful foods

*All lines in this block are paraphrased derived summaries — non-Open-Access source.*

> Mini-pigs are omnivores; the base diet should be a commercially available, nutritionally balanced pelleted chow formulated for mini-pigs, offered first so the pig consumes a balanced ration. [4]
> Safe greens include fresh or frozen vegetables and leafy greens such as celery, cucumbers, peppers, zucchini, carrots, squash, pumpkin, sweet potatoes and leafy greens; starchy vegetables like potatoes should be limited and canned vegetables avoided (high salt). [4]
> Fruits such as apples, grapes and pears may be fed in moderation because of high sugar content; fresh hay (timothy, orchard grass or brome) adds dietary fibre. [4]
> Foods harmful to mini-pigs include salty items (chips, pretzels), caffeine (coffee, tea, chocolate), commercial hog-growth feeds, un-pitted stone fruits and un-shelled nuts. [4]

### Nutrition of miniature pet pigs (Merck): balanced rations, meal frequency, foraging, obesity control

*All lines in this block are paraphrased derived summaries — non-Open-Access source.*

> Balanced diets give proper daily nutrients and prevent obesity. [6]
> Starter, grower and maintenance rations for miniature pigs come as crumbles or pellets. [6]
> Severe obesity can cause fat folds over the eyes, risking blindness with nervousness and irritability. [6]
> Avoid feeding pigs from bowls. [6]
> Make the pig forage for food at every meal. [6]
> For young pigs, commercial milk replacers or 2–3% pasteurised milk work. [6]

> *[Paraphrased derived summary — non-Open-Access source.]* Fresh water must be available at all times to prevent dehydration and salt toxicosis (water-deprivation sodium ion poisoning). [2]
> *[Paraphrased derived summary — non-Open-Access source.]* Miniature pet pigs need fresh water available at all times to prevent dehydration and salt toxicosis (water-deprivation sodium-ion intoxication); balanced diets are essential. [7]

## Husbandry


Provide a clean, dry, draft-free environment; miniature pet pigs are sensitive to extremes of heat and cold and need an outdoor area to root, since soil minerals benefit them. [2]


Housing, environment and daily-care essentials for this species.

### Mini pig handling & restraint — early harness/leash habituation, reward-based training, minimal-restraint technique (Merck-derived)

*All lines in this block are paraphrased derived summaries — non-Open-Access source.*

> Harness wearing and leash walking should be introduced to miniature pet pigs as early as possible — ideally while the pig is still very young and small, when it is more tractable. [8]
> Pairing new objects or activities (such as the harness) with treat feeding teaches the pig to associate the activity with pleasure. [8]
> Vigorously rubbing or scratching the skin can help desensitize the injection site before the needle is inserted. [8]

### Miniature pet pig housing — clean, dry, draft-free environment; sensitive to heat and cold extremes

*All lines in this block are paraphrased derived summaries — non-Open-Access source.*

> Access to a spacious, clean, outdoor environment is enriching for both sows and piglets and increases the chance piglets receive the iron they need naturally. [8]
> Miniature pet pigs (MPPs) may be housed outdoors or indoors (or both), but must be appropriately acclimated to the specific environment. [8]
> Inadequate opportunities for normal social interactions with other pigs may contribute to problematic behavior. [8]
> The frequency of trimming depends on the surfaces the pig walks on and the amount it is exercised. [8]
> Miniature pet pigs (MPPs) are sensitive to extremes of heat and cold and should be provided a clean, dry, draft-free environment. [8]
> Access to the outdoors should include an area for the pig to root in, as minerals in the soil are beneficial. [8]
> Appropriate management in the peripartum period can substantially reduce morbidity and mortality for dams and their offspring. [8]
> Failure to appropriately manage unwanted behavior is a common reason MPPs are placed in rescue operations or abandoned. [8]

> *[Paraphrased derived summary — non-Open-Access source.]* A large litter box with one lowered side works well. [3]

## Behavior & Training


Potbellied pigs are territorial and can grow more aggressive around 2 years, so neutering at 2–3 months helps avoid aggression; daily walks and play reduce boredom and undesirable behaviour. [3]


Socialisation, bonding, play and preventing boredom / behaviour problems.

### Mini Pig — behavior (owner-practical care, Merck Veterinary Manual pet-owner)

*All lines in this block are paraphrased derived summaries — non-Open-Access source.*

> Potbellied pigs are territorial. [3]
> Pigs enjoy rooting in blankets or a towel box for play. [3]
> A dirt box provides play; change the dirt regularly and clean the box before refilling. [3]
> Daily walks and play reduce boredom and undesirable behaviour. [3]
> Boredom can cause destructive chewing/rooting or aggression. [3]
> Keep the living/play area free of swallowable objects to save the pig's life. [3]
> Arrange play areas on the floor/ground. [3]
> Pigs do not sweat, so temperatures above 29.5°C (85°F) stress adults. [3]

> *[Paraphrased derived summary — non-Open-Access source.]* As healthy neutered MPPs mature, some grow more aggressive and threaten people. [2]
> Treats (small pieces of fruit or vegetable) may be given once or twice a day as training rewards, but excess treat-feeding can cause obesity and food aggression. [4]
> *[Paraphrased derived summary — non-Open-Access source.]* Pigs should be taught cues for basic behaviors such as sitting, staying and lying down; requiring a cued behavior before the pig gets what it wants is one way to teach it that it cannot demand things through aggression. [8]
> *[Paraphrased derived summary — non-Open-Access source.]* Punishment and other aversive techniques — yelling, stomping, hand clapping and slapping — should be avoided, because they often make the pig fearful of the punisher and increase its aggressive behavior. [8]
> *[Paraphrased derived summary — non-Open-Access source.]* Such threatening behavior must be addressed immediately and appropriately, or the pet may learn to use aggression to control its environment. [8]
> *[Paraphrased derived summary — non-Open-Access source.]* Around 2 years, many healthy pigs develop a more aggressive personality and challenge others for status. [3]
> *[Paraphrased derived summary — non-Open-Access source.]* An aggressive 100-pound pig can endanger children and adults. [3]
> *[Paraphrased derived summary — non-Open-Access source.]* Neutering at 2–3 months helps avoid aggression. [3]

## Enrichment & Exercise

Toys, foraging, hiding and exercise to prevent boredom.

### Mini Pig — enrichment (owner-practical care, Merck Veterinary Manual pet-owner)

*All lines in this block are paraphrased derived summaries — non-Open-Access source.*

> Housing for potbellied pigs may be provided outdoors, indoors, or both. [3]
> Pigs are curious and tend to chew everything. [3]
> Pigs gain weight easily and struggle to lose it once obese, since exercise options become limited. [3]
> Daily exercise and engaging activity support mental and physical health. [3]
> Regular exercise maintains health and prevents obesity. [3]
> Hide a toy in blankets/towels for a rooting game. [3]
> Keep walks and exercise at consistent daily times. [3]

## When to call a vet NOW


- **Salt toxicosis is an emergency:** fresh water must be available at all times, because an animal that eats excess sodium chloride, especially with limited water, can develop salt toxicosis — if water is ever unavailable or the pig shows signs after salt exposure, call a vet at once. [2] [7]
- **Heat stress:** pigs do not sweat, so temperatures above 29.5°C (85°F) stress adults — move the pig to a cooler place and contact a vet if it shows heat-stress signs. [3]
- **Dental problems:** elongated canines may show as persistent chewing and heavy salivation, untrimmed teeth cause discomfort and a misaligned bite, and elderly pigs may develop abscessed or exposed tooth roots — have a vet assess the mouth. [3] [9]
- **Mange check:** sarcoptic mange is the most common parasitic disease in pet pigs, and newly acquired pigs (especially from flea markets or shelters) may carry mange mites not yet causing signs — get a vet check. [2] [3]


## Health & Disease


Permanent canine teeth erupt at about 5–7 months and grow continuously, so untrimmed canines cause discomfort, a misaligned bite or injury; sarcoptic mange is the most common parasitic disease in pet pigs. [9] [2]

Common conditions and their clinical signs, drawn from professional veterinary references. If you notice worrying signs, contact a species-experienced veterinarian promptly.

### Miniature pig health — permanent canine teeth erupt at 5–7 months and grow continuously

> Rarely do the needle teeth (deciduous canines and lateral incisors) of newborn miniature piglets need to be trimmed. The risks of fractured teeth and subsequent infection typically outweigh the minor injury that these pigs can inflict upon each other and the sow. Permanent canine teeth erupt at ~5–7 months old and grow continuously. Elongated permanent canine teeth can easily cause injury to a person and damage to furnishings. When excessively long, they can lead to malocclusion and pain. [9]

> *[Paraphrased derived summary — non-Open-Access source.]* For procedures such as vaccination, minimal restraint is recommended: an assistant gently corrals the pig and the pig is continuously fed throughout the procedure; if the pig reacts, pausing and moving slowly lets most pigs resume eating so the procedure can continue. [8]
> *[Paraphrased derived summary — non-Open-Access source.]* First vaccinations are given at or after 4 weeks of age. [3]
> *[Paraphrased derived summary — non-Open-Access source.]* Pigs with no health-care history (e.g. rescues) need a second vaccination 3–4 weeks after the first. [3]
> *[Paraphrased derived summary — non-Open-Access source.]* A vet should give vaccinations, faecal worm checks, deworming, mange-mite treatment/prevention, and hoof/tusk trimming as needed. [3]
> *[Paraphrased derived summary — non-Open-Access source.]* Tooth trimming needs sedation/anaesthesia, often with a tetanus vaccination and tartar removal. [3]

## Toxicology & Hazards

Substances and environmental hazards to avoid.

### Miniature pig toxicology — salt (water-deprivation sodium ion) toxicosis when water limited

*All lines in this block are paraphrased derived summaries — non-Open-Access source.*

> Ingesting excess sodium chloride, especially when water is limited, can cause salt toxicosis; clinical signs vary between species and between acute and chronic exposure. [7]

> *[Paraphrased derived summary — non-Open-Access source.]* An animal that eats excess sodium chloride, especially with limited water, can develop salt toxicosis. [2]
> *[Paraphrased derived summary — non-Open-Access source.]* Add green leafy vegetables, alfalfa and grasses (not weeds—some are toxic) to satisfy appetite. [6]
> *[Paraphrased derived summary — non-Open-Access source.]* Use non-toxic litter; dry dirt or pine shavings are suitable. [3]

## Grooming

Brushing / bathing, nails, coat / skin and dental care.

### Mini Pig — grooming (owner-practical care, Merck Veterinary Manual pet-owner)

*All lines in this block are paraphrased derived summaries — non-Open-Access source.*

> A blanket to burrow under or a dirt box satisfies the rooting need and protects furnishings. [3]
> Newly acquired pigs (especially from flea markets or shelters) may carry mange mites not yet causing signs. [3]
> Newborn pigs should have their 8 needle teeth trimmed to protect littermates and the mother's teats/belly. [3]
> Permanent canine teeth erupt at about 5–7 months. [3]
> Canine teeth grow continuously for life. [3]
> Treat-free playtime reduces boredom and deters foreign-object eating and destructive behaviour. [3]
> Untrimmed canine teeth elongate, causing discomfort and a misaligned bite. [3]
> Elongated canines may show as persistent chewing and heavy salivation. [3]
> Elderly pigs may develop abscessed or exposed tooth roots. [3]

> *[Paraphrased derived summary — non-Open-Access source.]* Most pet pigs need regular nail trimming to avoid overgrowth. [2]
> *[Paraphrased derived summary — non-Open-Access source.]* The nails of most pet pigs require regular trimming; annual trimming is sufficient for most miniature pet pigs, and the frequency depends on the surfaces the pig walks on and how much it is exercised. [8]
> *[Paraphrased derived summary — non-Open-Access source.]* The nails of most pet pigs require regular trimming so they do not become overly long. [8]

## Breeding & Neutering

Neutering / spaying, reproduction and preventing unwanted litters.

### Mini Pig — breeding (owner-practical care, Merck Veterinary Manual pet-owner)

*All lines in this block are paraphrased derived summaries — non-Open-Access source.*

> Unneutered male pigs do not make good pets. [3]
> Rescue/adoption males should be neutered promptly. [3]
> Early spaying may improve females' temperament. [3]
> Potbellied pigs are very sensitive to extremes of heat and cold and need a clean, dry, draft-free environment. [3]
> Breeding of potbellied pigs is not encouraged for the amateur owner. [3]
> Females can reproduce as early as 3 months of age. [3]

> *[Paraphrased derived summary — non-Open-Access source.]* Neutering is usually done at 8–12 weeks of age. [2]

## Regulations & Legality

Legality crosswalk lines for this species, where available. Jurisdiction-specific pet law is frequently a gap — see the roadmap.

### Mini Pig — species legality crosswalk (US/CA/FL named lists + EU/JP/CITES framework)

> Mini Pig — EU-IAS: Not on the landed EU Union list of IAS of Union concern (species not enumerated) — Art 7 prohibition applies only to listed species. Basis: Negative finding: enumerated scan of landed EU Union list.
> Mini Pig — JP-IAS: Not designated in the landed JP specified-invasive alien species list (species not enumerated) — Art 4 prohibition applies only to designated species. Basis: Negative finding: enumerated scan of landed JP designated list.

## Appendix A — Commercial Food & Regulatory Notes

How pet-food regulatory standards treat this species (reference material, demoted from the main flow).

### Exotic / specialty pet food — AAFCO recognizes no nutrient profiles for exotics; standards defer to NRC species reports

> As an AAFCO-recognized nutrient profile or nutritional authority: [10]
> For dogs, the AAFCO Dog Food Nutrient Profiles; [10]
> For cats, the AAFCO Cat Food Nutrient Profiles; [10]
> For specialty pets, the nutrient recommendations approved by the Committee on Animal Nutrition of the National Research Council of the National Academy of Sciences [10]

## Appendix B — Research Evidence

Peer-reviewed papers indexed for this species (reference material). Entries whose abstract did not mention the species by name, or were flagged off-topic at source, were omitted as likely mis-clustered.

### Evidence cluster — Miniature pig (Sus scrofa) clinical cases (peer-reviewed, Europe PMC)

> **PMID 41952171 (2026, BMC veterinary research)** — Uterine squamous cell carcinoma in a 10-year-old Vietnamese pot-bellied pig (Sus scrofa domesticus). (opening): A 10-year-old intact female Vietnamese Pot-bellied pet pig (Sus scrofa domesticus) presented to the Production Animal Clinic at the Onderstepoort Veterinary Academic Hospital in South Africa (OVAH) with recurrent vaginal bleeding as the primary complaint. Clinical examination, vaginoscopy with vaginal cytology and abdominal ultrasound localised the haemorrhage to the reproductive tract and initially revealed a pyometra. After the failure of medical treatment with a luteolytic agent, anti-inflammatory and antibiotics, an exploratory laparotomy was performed, during which two macroscopical uterine lesions were observed. Histopathology identified the lesions as a squamous cell carcinoma infiltrating the endo- and myometrium and a focal endometrial polyp. An ovariohysterectomy resulted in a full recovery. No evidence of pulmonary metastases was found. *[CC BY — Open Access, verbatim with attribution.]* [11]

### Evidence cluster — Miniature pig (Sus scrofa) husbandry, health & nutrition (peer-reviewed, Europe PMC)

> **PMID 41897953 (2026, Animals: an open access journal from MDPI)** — Intestinal Development in Wuzhishan Pigs at Different Growth Phases: Insights from Microbiome and Metabolomics. (opening): Wuzhishan pigs are a typical Chinese indigenous miniature pig breed, with thin skin and high amino acid content in muscle; slow weight gain and long feeding phases limit their value. As the primary digestive and absorptive organ, the intestine is crucial for growth, yet current studies on its development are limited. This study aimed to investigate intestinal physiological differences in Wuzhishan pigs across four phases (pre-weaning: 7, 14 days; weaning: 35, 38, 45 days; fattening: 70, 100 days; maturity: 180, 240 days) by evaluating intestinal morphology, digestive enzyme activity, gut microbiota diversity via 16S rRNA gene sequencing, and metabolite characteristics via metabolomic analysis. Results showed poor intestinal morphology and enzyme activity during weaning, significant ileal and colonic microbial diversity differences across phases, increased beneficial bacteria with age, and enriched opportunistic pathogens ( Streptococcus, Romboutsia, Terrisporobacter ) during weaning; weaning also had lower lipid metabolites, correlated with decreased Fusobacterium, Lactobacillus, and Muribaculaceae. Fattening enhanced amino acid metabolism, with increased Lactobacillus correlated with higher amino acids and muscle-related metabolites, while maturity increased immune-related metabolites (e.g., pyridoxine) in the vitamin B6 pathway. These results explain delayed rapid weight gain in Wuzhishan pigs and provide a theoretical basis for maintaining intestinal stability and production performance. *[CC BY — Open Access, verbatim with attribution.]* [12]

## References

[1] https://spca.bc.ca/news/mini-pigs  
    *grade C: T4 expert organisation, paraphrase (computed per docs/topic_grading_guide.md §4)*
[2] https://www.merckvetmanual.com/exotic-and-laboratory-animals/miniature-pet-pigs  
    *grade B: T3 professional reference, paraphrase (computed per docs/topic_grading_guide.md §4)*
[3] https://www.merckvetmanual.com/all-other-pets  
    *grade B: T3 professional reference, paraphrase (computed per docs/topic_grading_guide.md §4)*
[4] https://vcahospitals.com/know-your-pet/feeding-your-mini-pig  
    *grade C: T4 expert organisation, paraphrase (computed per docs/topic_grading_guide.md §4)*
[5] https://pubmed.ncbi.nlm.nih.gov/37625943  
    *grade B: T2 peer-reviewed, paraphrase (computed per docs/topic_grading_guide.md §4)*
[6] https://www.merckvetmanual.com/exotic-and-laboratory-animals/miniature-pet-pigs/feeding-and-nutrition-of-miniature-pet-pigs  
    *grade B: T3 professional reference, paraphrase (computed per docs/topic_grading_guide.md §4)*
[7] https://www.merckvetmanual.com/  
    *grade B: T2 peer-reviewed/T3 professional reference, paraphrase (computed per docs/topic_grading_guide.md §4)*
[8] https://www.merckvetmanual.com/exotic-and-laboratory-animals/miniature-pet-pigs/management-of-miniature-pet-pigs  
    *grade B: T3 professional reference, paraphrase (computed per docs/topic_grading_guide.md §4)*
[9] https://www.merckvetmanual.com/exotic-and-laboratory-animals/pigs  
    *grade B: T3 professional reference, verbatim (computed per docs/topic_grading_guide.md §4)*
[10] AAFCO — Dog / Cat / Specialty-Pet Food Nutrient Profiles (NRC for specialty pets) — https://www.aafco.org/  
    *grade A: T1 government/standard, verbatim (computed per docs/topic_grading_guide.md §4)*
[11] https://pubmed.ncbi.nlm.nih.gov/41952171/  
    *grade A: T2 peer-reviewed, verbatim (computed per docs/topic_grading_guide.md §4)*
[12] https://pubmed.ncbi.nlm.nih.gov/41897953/  
    *grade A: T2 peer-reviewed, verbatim (computed per docs/topic_grading_guide.md §4)*

## Supplement Data Roadmap

*Known gaps in this manual, machine-checked against the published text on every build; an item appears only while the gap is still real.*

- **Root-domain reference(s)**: https://www.merckvetmanual.com/, https://www.aafco.org/ — these point to a source home page rather than the exact page; being fixed.