Dairy Cow Udder Health: Mastitis Welfare and Prevention

Mastitis is the most costly and one of the most welfare-significant diseases in dairy cattle. Understanding prevention and treatment protects both cow welfare and farm sustainability.

Key Facts

Mastitis affects approximately 25-40% of cows in a typical dairy herd annually
Clinical mastitis causes pain, fever, and systemic illness requiring prompt veterinary treatment
Subclinical mastitis without visible signs is more prevalent and causes chronic welfare harm
The most common causative bacteria include Staphylococcus aureus, Streptococcus uberis, and E. coli
Teat disinfection after milking (post-dipping) reduces new infection rates by up to 50%
Dry cow therapy has shifted toward selective treatment of infected cows rather than blanket antibiotic use
Early detection through somatic cell count monitoring identifies subclinical mastitis before clinical signs

Welfare Considerations

Mastitis causes significant and multidimensional welfare harm. Clinical mastitis involves the pain of infection, fever, systemic illness, and the discomfort of an engorged, tender udder being milked. Subclinical mastitis causes chronic low-grade inflammation and pain that is invisible to casual observation. Cows with untreated or recurrent mastitis experience cumulative tissue damage and permanent production loss. The high prevalence of mastitis in dairy herds means it represents a welfare burden affecting a substantial proportion of cows at any given time. Prevention-focused udder health programs reduce both the incidence and severity of suffering from this common condition.

What You Can Do

Implement post-dipping immediately after every milking as a fundamental mastitis prevention measure
Monitor bulk tank somatic cell counts as a herd-level udder health indicator
Sample and culture all clinical mastitis cases before treating to guide antibiotic selection
Treat clinical mastitis cases promptly with appropriate antibiotics and anti-inflammatory pain relief
Adopt selective dry cow therapy guided by somatic cell count records and culture results
Maintain milking machine function through regular service and testing of vacuum levels and pulsation
Set udder health targets including clinical mastitis incidence rate and bulk tank SCC with veterinary guidance