Farm Animals

Pig Weaner Gut Health and Microbiome

The weaner pig gut microbiome is disrupted by early weaning and dietary change, causing dysbiosis and diarrhoea that represent significant welfare and production challenges.

Key Facts

Post-weaning dysbiosis causes diarrhoea affecting up to 30% of weaner pigs in some systems
Beneficial Lactobacillus species are displaced by pathogenic E. coli after weaning
Organic acids, probiotics and zinc oxide (where permitted) support microbiome recovery
Dietary fibre sources including chicory and sugar beet pulp support beneficial microbial diversity
Gradual dietary transition reduces microbiome disruption better than abrupt feed change

Welfare Considerations

Weaner gut dysbiosis causes significant suffering through diarrhoea and systemic illness. Nutritional interventions supporting microbiome recovery reduce antibiotic dependence and welfare costs.

What You Can Do

Support farms investing in nutritional strategies that reduce post-weaning diarrhoea
Advocate for research into probiotic and dietary alternatives to prophylactic antibiotics
Ask pork producers about their approach to weaner gut health management