# Pigs and pasture: Drivers and characteristics of outdoor systems on the island of Ireland

**Authors:** Ophelie Menant, Laura Boyle, Siobhan Mullan, Fidelma Butler, Keelin O’Driscoll, Mehdi Borhani, Grzegorz Woźniakowski, Grzegorz Woźniakowski

PMC · DOI: 10.1371/journal.pone.0341440 · PLOS One · 2026-02-03

## TL;DR

This study explores outdoor pig farming in Ireland, highlighting its benefits for animal welfare and the challenges it faces for sustainability.

## Contribution

The first characterization of outdoor pig production practices and challenges on the island of Ireland.

## Key findings

- Animal welfare, food quality, and traceability were primary motivations for outdoor pig farming.
- Fifty-six percent of farmers used alternative health strategies avoiding antibiotics and chemicals.
- Feed costs, weather, fencing, and soil maintenance were the most reported challenges.

## Abstract

Outdoor systems offer benefits to pig welfare but they also pose challenges and are less well researched than indoor. This study characterized, for the first time, current husbandry and management practices of outdoor pig production on the island of Ireland, in order to understand associated drivers, challenges and changes needed for sustainable development. An online survey conducted from December 2022 to April 2023 (n = 90 respondents) revealed that animal welfare, food quality, and traceability concerns were the primary reasons for raising pigs outdoors, regardless of whether the pigs were raised for sale (meat or live pigs) or other (e.g., personal meat consumption, pet, land management) purposes. Most of the respondents expressed concerns about animal welfare in conventional systems, and emphasized the importance of the “Five Freedoms”. A significant cohort of respondents (56%) adopted alternative health management strategies based on season and soil management (paddock rotation, use of straw bedding on muddy areas), and by avoiding the use of antibiotics and other chemicals. Farms were small (median: 20.5 pigs, 1.02 ha), half were engaged with pig societies, and used traditional/rare breeds, which are adapted to outdoor conditions and that farmers can sell as superior quality pigmeat. The most frequently reported challenges were feed costs, inclement weather, fencing and soil maintenance. The most mentioned “needs” of the industry were financial support and consumer education. While participants chose to raise pigs outdoors to improve animal welfare, meat quality and traceability; overcoming challenges related to finance, infrastructure, and education is vital to their future sustainability.

## Linked entities

- **Chemicals:** antibiotics (PubChem CID 46874763)
- **Species:** Sus scrofa (taxon 9823)

## Full-text entities

- **Genes:** SCD (stearoyl-CoA desaturase) [NCBI Gene 396670]
- **Diseases:** skin lesions (MESH:D012871), pain (MESH:D010146), flooding (MESH:C565009), overweight (MESH:D050177), skin parasites (MESH:D012876), dehydration (MESH:D003681), - intestinal parasites (MESH:D007411), poor body condition (MESH:D009123), gastrointestinal disorders (MESH:D005767), watery eyes (MESH:D003969), respiratory symptoms (MESH:D012818), health disorders (OMIM:603663), reproduction difficulties (MESH:D060737), gastrointestinal problems (MESH:D012817), lameness (MESH:D007794)
- **Chemicals:** Water (MESH:D014867), C02 (-)
- **Species:** Homo sapiens (human, species) [taxon 9606], Sus scrofa (pig, species) [taxon 9823], Viruses (acellular root) [taxon 10239], Isospora (genus) [taxon 56625], Eimeria (genus) [taxon 5800], Bacteria Latreille et al. 1825 (Bacteria stick insect, genus) [taxon 629395]

## Full text

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## Figures

8 figures with captions in the complete paper: https://tomesphere.com/paper/PMC12867241/full.md

## References

50 references — full list in the complete paper: https://tomesphere.com/paper/PMC12867241/full.md

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Source: https://tomesphere.com/paper/PMC12867241