Gut Microbiome and Animal Welfare

The gut microbiome influences animal health, immunity, and potentially mood and stress responses. Farm management practices that support microbiome health improve animal welfare.

Key Facts

Early microbiome establishment in piglets and calves is critical for lifetime health
Antibiotic treatment significantly disrupts gut microbiome, affecting immune function
Probiotic and prebiotic feed supplements can improve microbiome diversity in farmed animals
Pasture access improves gut microbiome diversity compared to intensive confinement
Stress hormones alter gut microbiome composition, creating a microbiome-welfare feedback loop

Welfare Considerations

Gut microbiome health is increasingly recognised as central to animal wellbeing. Disrupted microbiomes increase disease susceptibility, digestive disturbances, and may affect behaviour and stress responses through the gut-brain axis. Antibiotic use that prevents disease in intensive systems simultaneously disrupts microbiome health. Management practices that support microbiome diversity - pasture access, appropriate nutrition, minimal unnecessary antibiotic use, and reduced stress - align with broader welfare improvements. This is an emerging field where science is moving faster than farm practice.

What You Can Do

Support research into microbiome health as a welfare indicator
Advocate for farming practices that support gut microbiome diversity
Choose animal products from extensive systems where pasture access supports microbiome health
Engage with the antibiotic reduction agenda as a microbiome and welfare issue
Follow microbiome research to understand new welfare implications as science develops