Correlated changes in behavioral indicators of lameness in dairy cows following hoof trimming
Correlated changes in behavioral indicators of lameness in dairy cows following hoof trimming
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DOI：
10.3168/jds.2010-3426
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发表时间：
2010-12-01
影响因子：
3.5
通讯作者：
Rushen, J.
中科院分区：
文献类型：
--
作者：
Chapinal, N.;de Passille, A. M.;Rushen, J.
奶牛步态，步行速度，躺下花费的时间，和腿之间的重量分布时，站在一周前和长达5周后，蹄修剪48泌乳荷斯坦奶牛圈养在自由放养围栏检查蹄修剪后的步态评分的变化与其他行为变化相关。不同奶牛对蹄修剪的步态反应不同，大多数奶牛的步态评分没有变化或增加。蹄修剪后，步行速度降低，并在接下来的4周内保持这种下降。蹄修剪后的步行速度变化与步态变化呈负相关（r =-0.33）。在修剪蹄之前，跛足奶牛显示施加在后腿上的重量的标准差更大（38.4 vs. 27.2;差异的标准误= 4.6）。蹄修剪后，跛脚奶牛表现出二次增加的标准偏差的重量施加到后腿和后腿重量比，而不存在时间趋势的nonlame奶牛。蹄修剪后步态的变化与腿重比的变化呈负相关（r =-0.44）。在修剪蹄之前，跛脚奶牛每天躺下的时间比非跛脚奶牛多（801.7与731.7分钟/天;差异的标准误= 29.7）。跛脚和nonlame奶牛增加了他们每天花的时间躺在蹄修剪后，和每天躺的时间保持较高的蹄修剪后5周。蹄修剪后躺卧时间的变化与步态变化（r = 0.30）和腿重比变化（r =-0.47）相关。使用跛行检测的自动化方法显示出作为一种连续监测动物以检测与跛行发作或从跛行恢复相关的行为变化的方法的前景。
Cow gait, walking speed, time spent lying down, and distribution of weight among legs when standing during the week before and up to 5 wk after hoof trimming were assessed in 48 lactating Holstein cows housed in freestall pens to examine how changes in gait score following hoof trimming were correlated with other behavioral changes. Gait responses to hoof trimming varied between cows, with the majority showing no change or an increase in gait score. Walking speed was reduced after hoof trimming, and this decrease was maintained during the following 4 wk. The change in walking speed following hoof trimming negatively correlated with the change in gait (r = -0.33). Before hoof trimming, lame cows showed a greater standard deviation of the weight applied to the rear legs (38.4 vs. 27.2; standard error of the difference = 4.6). After hoof trimming, lame cows showed a quadratic increase in the standard deviation of the weight applied to the rear legs and the rear leg weight ratio, whereas no time trend existed for nonlame cows. The change in gait following hoof trimming was negatively correlated with the change in leg weight ratio (r = -0.44). Before hoof trimming, lame cows spent more time lying down each day than nonlame cows (801.7 vs. 731.7 min/d; standard error of the difference = 29.7). Both lame and nonlame cows increased the time they spent each day lying down after hoof trimming, and daily lying time remained higher for up to 5 wk after hoof trimming. The change in time spent lying down after hoof trimming was correlated with the change in gait (r = 0.30) and the change in leg weight ratio (r = -0.47). Using automated methods of lameness detection shows promise as a way of continuously monitoring animals to detect changes in behavior associated with the onset of or recovery from lameness.