Long-term effects of good handling practices during the pre-weaning period of crossbred dairy heifer calves

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• 作者：Luciana Pontes Silva ; Aline Cristina Sant’Anna…
• 关键词：Animal welfare ; Calves ; Calf handling ; Temperament
• 刊名：Tropical Animal Health and Production
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：49
• 期：1
• 页码：153-162
• 全文大小：
• 刊物类别：Medicine
• 刊物主题：Zoology; Veterinary Medicine/Veterinary Science;
• 出版者：Springer Netherlands
• ISSN：1573-7438
• 卷排序：49

文摘

The aim of this study was to determine whether applying good practices of handling during the pre-weaning period have long-term effects on behavioral and physiological indicators, health status, and average daily gain (ADG) of crossbred Bos taurus × Bos indicus heifer calves. During the pre-weaning period, 98 crossbred of Holstein × Gir heifer calves were allotted into three treatments: (1) good practices of handling + brushing (GPB; n = 25), (2) good practices of handling (GP; n = 25), and (3) control (n = 48). Every 2 months, four evaluation periods (EVb>1b> to EVb>4b>) were conducted to record data. Behavioral indicators comprised time to drive (TD), flight speed (FS), flight distance (FD), and composite reactivity score (CRS). Physiological indicators of acute stress during handling comprised respiratory and heart rates. Health status comprised data regarding occurrence of most common diseases (i.e., pneumonia and anaplasmosis). Collected data were analyzed by using a linear mixed model for repeated measures, Tukey’s test, and chi-squared procedures. Treatment influenced (P < 0.05) TD, FS, and FD but not CRS (P = 0.78). From EVb>1b> to EVb>3b>, the control calves had the lowest TD. The GPB group had lower FS than the control but did not differ from GP. The GPB group had lower FD means than the other two groups in EVb>2b>, EVb>3b>, and EVb>4b>. No differences (P > 0.05) due to treatment were observed on heart and respiratory rates, ADG, or occurrence of pneumonia and anaplasmosis. It was concluded that adoption of good practices of handling during pre-weaning period may lead to long-term positive effects.