Liver Abscess in Feedlot Cattle | Animal Welfare Hub

Liver abscesses affect an estimated 12-32% of feedlot cattle and represent a major welfare and economic problem linked to high-grain diets used to maximize growth rates.

Key Facts

Feedlot diets high in rapidly fermentable starch cause rumen acidosis that leads to liver abscesses
Fusobacterium necrophorum bacteria from the rumen wall migrate to the liver causing abscesses
Affected cattle experience chronic pain and reduced feed intake but rarely show obvious signs
Industry data suggests 12-32% of cattle at slaughter have liver abscesses of varying severity
Routine antibiotic use — particularly tylosin — is the main prevention method used in the US
Liver abscess contributes to antibiotic resistance concerns in food animal production
Alternative prevention approaches include dietary management and rumen buffers

Welfare Considerations

Liver abscesses represent a significant and widespread welfare problem in intensive beef production. Because cattle mask signs of illness, affected animals may endure prolonged internal infection without triggering intervention. The high prevalence is a direct consequence of production systems optimized for rapid weight gain rather than animal health. Reducing reliance on preventive antibiotics requires systemic dietary changes that may reduce profitability.

What You Can Do

Support beef producers and brands that use higher-forage slower-growth production systems
Ask retailers about sourcing policies and animal welfare standards in their beef supply chains
Support policies that reduce routine antibiotic use in livestock production
Choose plant-based protein alternatives when possible to reduce demand pressure