The objective of this study was to assess the effects of captive bolt length and breed type on post-stun leg activity in cattle. A total of 2850 Holstein (HOL) and non-Holstein British/Continental bred (NHOL) steers and heifers were observed post-stunning at a large commercial slaughter facility. A pneumatically powered penetrating captive bolt stunner was used with three different bolt lengths: CON, 15.24 cm; MED, 16.51 cm; and LON, 17.78 cm. Hind limb kicking, forelimb activity, take away belt stops, carcass swing and number of knife sticks during exsanguination were recorded for each animal from video recording. Hind limb and forelimb kicks observed ranged from 0 to 25 and 0 to 8, respectively. Analysis of post-stun hind limb and forelimb activity indicated that increasing pneumatically powered penetrating captive bolt length does not decrease post-stun leg activity. There was a higher percentage of cattle experiencing take away belt stops and carcass swing in HOL as compared with NHOL.

这项研究的目的是评估圈养的螺栓长度和品种类型对牛眩晕后腿活动的影响。在大型商业屠宰场中，观察到总共2850头荷斯坦（HOL）和非荷斯坦英国/大陆育种（NHOL）的公牛和小母牛。使用气动穿透式俘获螺栓击晕器，具有三种不同的螺栓长度：CON，15.24厘米；MED，16.51厘米；和LON，17.78厘米。从视频记录中记录了每只动物的后肢踢脚，前肢活动，带走停止，car体摆动和放血过程中的刀棍数量。观察到的后肢踢和前肢踢分别在0到25和0到8范围内。对昏迷后肢和前肢活动的分析表明，增加气动穿透性自留螺栓的长度不会降低昏迷后腿的活动。与NHOL相比，HOL中发生带走带停止和and体摆动的牛比例更高。