Teat Health and Milking Welfare in Dairy Cows
Teat Health Overview
The teat is the entry point for mastitis pathogens and an important welfare indicator. Teat condition affects milking comfort, bacterial challenge, and mastitis risk. Key teat health measures include: teat-end hyperkeratosis (roughening/proliferation of teat-end tissue due to over-milking or high vacuum), teat canal condition, and teat skin condition. Regular teat scoring by trained staff identifies problems early.
Teat-End Hyperkeratosis and Welfare
Teat-end hyperkeratosis is caused by excessive traction from milking cluster application, high vacuum levels, or prolonged milking. Rough, proliferated teat ends harbour bacteria, increasing mastitis risk. They are also associated with teat pain during milking. Scoring systems (NAHMS score: smooth, slight, moderate, rough) allow monitoring. Addressing the root cause (equipment calibration, milking routine, individual cow review) reduces hyperkeratosis and associated welfare problems.
Milking Routine and Stress
Poor milking routine causes stress and reduces milk let-down. Key welfare-friendly practices include: pre-milking stimulation (1-2 minutes) to promote oxytocin release; gentle cow handling during milking; avoiding rushing; ensuring clusters are applied correctly and removed promptly after milk flow drops; avoiding bimodal milking (cluster applied before adequate let-down causes vacuum-induced teat damage); and maintaining cows in a calm state.
Teat Dipping and Mastitis Prevention
Post-milking teat dipping or spraying with teat dip solution (iodine, chlorhexidine, barrier dips) closes the teat canal and kills surface bacteria, reducing new intramammary infections. Pre-milking teat cleaning reduces bacteria entering the teat canal during milking. Barrier dips (containing emollients) protect teat skin in harsh weather conditions. Maintaining teat skin condition reduces entry for environmental bacteria.
Robotic Milking Welfare
Automatic milking systems (AMS/robots) are increasingly common on UK dairy farms. Cow welfare in AMS differs from conventional milking: cows milk voluntarily at their preferred frequency; stress of twice-daily collection is reduced; but cows with teat abnormalities or low production may not milk voluntarily and require fetching. AMS requires careful monitoring of individual cow visits, milk yield, and teat health to identify welfare problems that may be less visible than in conventional parlour milking.