The occurrence of reflexes and reactions in cattle following stunning with a captive bolt at the slaughterhouse

摘要

The difference in the frequency of the occurrence of reflexes/reactions in 355 cows (average weight 505.5 +/- 7.9 kg) and 262 bulls (average weight 735.6 +/- 8.4 kg) following stunning with a Matador SS 3,000 B trigger-activated captive bolt gun (Termet) was determined. The stun shot more than 2 cm from the ideal position was found in 79.6% of animals. Vocalization, corneal reflex, rhythmic breathing, blinking, eyeball rotation and the absence of tongue protrusion occurred more frequently in bulls (p <.05). Spontaneous limb movements and nystagmus occurred more frequently in cows (p <.05). No difference between bulls and cows was determined in the occurrence of a response to painful stimuli or attempts to regain normal posture. No dependency was determined between the frequency of the occurrence of a reflex/ reaction and the distance of the stun shot from the ideal point on the skull for any of the monitored signs. This study shows that the occurrence of reflexes/reactions following the stunning of cattle with a captive bolt is not only dependent on the position of the shot if placed within a 9 cm radius from the ideal point on the cattle skull.