The gut microbiome profoundly influences farm animal health, behavior, and stress responses. Emerging science suggests microbiome management may be a welfare tool.
The gut microbiome represents an emerging frontier in understanding farm animal welfare. The gut-brain axis means that chronic gut dysbiosis (microbial imbalance from stress, poor diet, or antibiotic use) may contribute to behavioral abnormalities and negative emotional states. Management practices that repeatedly disrupt the microbiome - antibiotic treatment, abrupt dietary transitions at weaning, transport stress - may cause cascading welfare impacts beyond their immediate effects. Conversely, microbiome-supportive practices like gradual weaning, probiotic supplementation, and reduced antibiotic use may improve both welfare and production outcomes, creating alignment between animal wellbeing and economic interest.