Cattle Mastitis Welfare and Udder Health

Mastitis is the most costly disease in dairy farming and a leading cause of cow welfare suffering, causing painful udder inflammation that requires both acute treatment and systematic prevention.

Key Facts

Clinical mastitis affects approximately 25-40 percent of UK dairy cows annually — the most economically significant disease in dairying
The condition causes udder swelling, heat, pain, and changes to milk character ranging from mild clots to severe watery secretion
Severe mastitis with systemic signs (fever, dullness, recumbency) is a life-threatening emergency
Dry cow therapy (antibiotic infusion at drying off) prevents new infections during the dry period
Selective dry cow therapy — treating only infected cows rather than all cows — requires robust mastitis monitoring systems
Mastitis pathogens include Staphylococcus aureus, E. coli, and Streptococcus spp — each requiring different treatment approaches

Welfare Considerations

Clinical mastitis causes significant acute welfare suffering. The udder becomes hot, swollen, and painful to the touch — cows with severe mastitis are visibly distressed and may refuse to allow milking. Severe coliform mastitis causes systemic endotoxaemia with fever, inappetence, and cardiovascular collapse that can be fatal within 24 hours. Anti-inflammatory (NSAID) treatment alongside antibiotics is critical for welfare — reducing the pain and systemic inflammation component significantly improves cow comfort and recovery speed. The chronic welfare burden of subclinical mastitis — elevated somatic cell counts without obvious signs — is more diffuse but still represents udder inflammation and discomfort affecting many cows in high SCC herds.

What You Can Do

Ensure all clinical mastitis cases receive anti-inflammatory (NSAID) treatment alongside appropriate antibiotic therapy as a welfare standard
Implement a robust teat and udder health monitoring programme with monthly SCC records reviewed at herd health visits
Support research into selective dry cow therapy protocols that reduce antibiotic use while maintaining welfare outcomes
Choose dairy products from farms with documented mastitis management protocols and low SCC targets