Exploring herd-level perinatal mortality risk factors in Canadian dairy farms

These supplementary materials are a questionnaire that was used to identify factors associated with perinatal mortality in Canadian dairy farms and a causal diagram figure for the paper titled \"Exploring herd-level perinatal calf mortality risk factors in eastern Canadian dairy farms\". In total 19 factors were selected.本补充材料包含两部分：一是用于识别加拿大奶牛场围产期死亡率相关影响因素的调查问卷，二是题为《加拿大东部奶牛场畜群水平围产期犊牛死亡风险因素探究》的论文配套的因果关系图。本次研究共筛选出19项影响因素。