Simple Summary:

Mastitis is a painful and economically significant udder infection that reduces milk production and can result in death in severe cases. During a kidding season, a commercial dairy goat herd experienced a severe outbreak of mastitis caused by Staphylococcus aureus, a contagious bacterium transmitted primarily during milking. Approximately one-third of the herd developed gangrenous mastitis, resulting in mortality. A substantial proportion of apparently healthy goats had S. aureus recovered from their milk, contributing to bacterial dissemination. Poor milking hygiene and milking equipment maintenance were identified as key risk factors for transmission. Goats with infections scored higher on an on-farm screening test, demonstrating its utility for early detection and management. Control measures, including improved milking hygiene, equipment maintenance, segregation of infected animals, and vaccination of replacement does, successfully reduced S. aureus to undetectable levels in the subsequent two kidding seasons, although environmental Staphylococci persisted. This case highlights the role of subclinical carriers in mastitis outbreaks and illustrates practical interventions that enhance animal welfare, milk quality, and farm sustainability.