Bovis ISSN 2398-2993

Investigating milk drop: dairy herd

Contributor(s): Paddy Gordon , Virginia Sherwin

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  • Milk drop is defined here as herd milk yield below expectations.
  • This can be a sudden decline in yield, or chronic herd underperformance.
  • As dairy vets become more involved in herd health planning it is likely that they will be asked to investigate and account for herd milk drop.
  • Such investigations require experience and a long view but can be rewarding to monitor as herds move forwards with improved health, welfare and production.
  • Yields may change by around 1-2 litres per cow per day and this may be within expectations.
  • When the change reaches 10% of daily yield this is of greater concern.


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