Abstract This study investigated the effect of milk allowance on the suitability of behavioural and physiological responses, individually and in combination, as early disease indicators. A total of 120 heifer calves were assigned into a 5 L/d or 10 L/d milk allowance treatment group. Daily health checks were conducted to determine when calves presented clinical signs of neonatal calf diarrhoea (NCD). Automated calf feeders recorded milk feeding behaviour, and infrared cameras automatically recorded eye and cheek temperatures. Accelerometers recorded lying behaviour, and water drinking behaviour was recorded using an automated water system and video observations. Respiration rate was recorded once per day by counting flank movements. Calves were used as their own controls, with data analysed relative to the day of clinical identification (d 0). Based on changes which occurred over the 6 days prior to clinical signs of disease (across d -6 to 0), typically, feeding behaviours only changed significantly for calves on the 10 L/d milk allowance with an increase in total (P

中文翻译：

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牛奶津贴对自动化行为和生理测量作为犊牛早期疾病指标的适用性的影响

摘要 本研究调查了牛奶津贴对行为和生理反应适宜性的影响，无论是单独还是组合，作为早期疾病指标。总共 120 头小母牛被分配到 5 L/d 或 10 L/d 牛奶津贴治疗组。每天进行健康检查以确定小牛何时出现新生小牛腹泻 (NCD) 的临床症状。自动小牛喂食器记录牛奶喂养行为，红外摄像机自动记录眼睛和脸颊温度。加速度计记录了说谎行为，喝水行为是使用自动供水系统和视频观察记录的。通过计数侧翼运动每天记录一次呼吸率。小牛被用作他们自己的对照，数据分析相对于临床鉴定之日 (d 0)。