Teknologisk Institut

Pia Brandt

Leif Lykke

Lars Ole Blaabjerg

Helle Daugaard Larsen

Margit Dall Aaslyng

When stunning animals e.g. by CO-stunning aversive reactions may be seen among the animals as a reaction to the high concentration of CO. To avoid the aversive reactions animals can be pre-stunned before being final-stunned and perhaps killed or slaughtered when stunned. Pre-stunning of animals may be performed with a combination of gas for pre-stunning comprising at least air and/or Otogether with COe.g. in a concentration below 40%, at least air and/or O2 together with N2O, or at least air and/or Otogether with NO and CO, where COmay bi in a concentration below 40%. For larger animals such as pigs pre-stunning is performed for less than 60 seconds. A stunning system may comprise means for pre-stunning of animals before performing a final-stunning and may include gas storage for re-use of the pre-stunning gas.

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Pia Brandt