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You are here: Home / Interesting Facts / The onset of permanent insensibility in sheep during slaughter

The onset of permanent insensibility in sheep during slaughter

February 11, 2014

Sheep in raceway

The time of onset of permanent insensibility, subsequent to incision of the major blood vessels of the neck, was studied in sixteen adult sheep and five one-week-old lambs. Insensibility was determined from the study of electroencephalograms (EEG).

In both adult sheep and lambs, conscious at the time of slaughter, insensibility occurred within 2 to 7 s and EEG traces became isoelectric between 10 and 43 s. In the majority of animals, the electrocardiogram (ECG) continued to show a normal pattern for more than 10 min after slaughter. There was an initial rise in blood pressure in the first 5 to 7 s and it remained elevated for a further 10 to 20 s.

The results of this work are discussed with reference to definition of death appropriate for statutory purposes and the implications for the humane slaughter of sheep.

Newhook J.C., Blackmore, D.K., Meat Science, Volume 6, April 1982

 

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