Why is it measured?

Recording levels of mortality can help establish relationships between potential welfare issues (e.g. injurious feather pecking) and resulting levels of mortality.

How to assess and score using the AssureWel measure

7. Mortality
Sample size: Whole flock
Method of assessment: Refer to records and/or ask the unit manager
Record: a) Mortality of previous flock
b) Mortality to date
c) Mortality to 40 weeks (where applicable)
Record if possible, causes of mortality


  1. Feather loss
  2. Bird dirtiness
  3. Beak trimming
  4. Antagonistic behaviours
  5. Flightiness
  6. Birds needing further care
  7. Mortality

Laying hens ranging


Making improvements

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