As liners age they begin to stretch and lose tension, compromising their ability to properly massage the teat and maintain the blood supply.

Excessively worn liners tend to result in:

  • Increased milking times
  • Increased amounts of milk left in the udder
  • Increased risk of teat end damage
  • Increased risk of cup slips and falls
  • Increased risk of spread of mastitis bacteria

This deterioration is a gradual but steady process which results in a progressive increase in the risk of mastitis - you may not even notice the early changes, but the mastitis risk is steadily increasing.

If you do change your liners and you notice a difference in milking performance, then the old liners were definitely in for too long - and the mastitis risk is likely to have increased significantly.

A key element of the Dairy Focus Mastitis Control System is the Dairy Focus Mastitis Diary which ensures all mastitis related activities, inlcuding liner changes, occur on time every time.

Knowledgebase categories


General information about mastitis - what is it, what causes it, what does it cost?


How does the milking process influence the risk of mastitis?


What factors influence the risk of mastitis around calving?


How does the dry-off process influence the risk of mastitis in the dry period and at calving?


How can you minimise the effect of the environment?


When to cull, who to cull, how to choose?

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