Accurate identification of sheep is important for achieving precise animal management and welfare farming in large farms. In this study. a sheep face detection method based on YOLOv3 model pruning is proposed. abbreviated as YOLOv3-P in the text. https://www.roneverhart.com/Western-Digital-Re-WD6001FSYZ-6TB-7-2K-RPM-SATA-6Gb-s-128MB-3-5-Hard-Drive/