We evaluated the influences of workload intensity, bath handling and environmental conditions in the rolling behaviour of horses and mules. For this purpose, animals were observed after being exposed to different levels of workload and the rolling behaviour was recorded and described. During all testing procedures, the weather condition (temperature and humidity) was registered by a Black globe and Wet Bulb apparatus. Horses frequently rolled after intense exercise and after bath handling, independently of the weather condition. Mules frequently rolled after control (no exercise) and intense exercise in warmer and wetter days and after bath handlings in colder and drier days. Rolling behaviour characteristics were slightly different between species. While mules exhibited more frequently the behaviours of rest, self-care, yawn, tail swishing, complete spins, snort vocalization and use of the same spot to roll, horses exhibited more frequently the behaviours of paw, sniff, head and neck rubbing movements and incomplete spins to the right and left. This findings evidence that rolling is an important and frequently exhibited behaviour by domestic horses and mules, but animals may express it differently and may have their own motivations. In this sense, we believe that domestic equines, mainly those raised in more intensive livestock, should have the opportunities to freely express the rolling, as a way to improve their welfare conditions and with agreement with a more rational handling practice.

我们评估了马匹和骡子的滚动行为中的工作强度、洗澡处理和环境条件的影响。为此，在暴露于不同水平的工作负荷后观察动物，并记录和描述滚动行为。在所有测试过程中，天气条件（温度和湿度）由黑球和湿球装置记录。马匹在剧烈运动和洗澡后经常翻滚，不受天气条件的影响。在温暖和潮湿的日子里，骡子经常在控制（没有运动）和剧烈运动后滚动，在寒冷和干燥的日子里洗完澡后。滚动行为特征在物种之间略有不同。虽然骡子更频繁地表现出休息、自理、打哈欠、甩尾、完全旋转、哼哼发声和使用同一点滚动，马更频繁地表现出爪子、嗅探、头颈部摩擦运动和左右不完全旋转的行为。这一发现证明，滚动是家马和骡子的一种重要且经常表现出的行为，但动物可能会以不同的方式表达它，并且可能有自己的动机。从这个意义上讲，我们认为家马，主要是那些饲养在更密集的牲畜中的马，应该有机会自由表达滚动，作为改善其福利条件的一种方式，并同意更合理的处理做法。头部和颈部摩擦运动和不完全的左右旋转。这一发现证明，滚动是家马和骡子的一种重要且经常表现出的行为，但动物可能会以不同的方式表达它，并且可能有自己的动机。从这个意义上说，我们认为家马，主要是那些饲养在更密集的牲畜中的马，应该有机会自由表达滚动，作为改善其福利条件的一种方式，并同意更合理的处理做法。头部和颈部摩擦运动和不完全的左右旋转。这一发现证明，滚动是家马和骡子的一种重要且经常表现出的行为，但动物可能会以不同的方式表达它，并且可能有自己的动机。从这个意义上说，我们认为家马，主要是那些饲养在更密集的牲畜中的马，应该有机会自由表达滚动，作为改善其福利条件的一种方式，并同意更合理的处理做法。