| Summary: | <em><span lang="EN-US">This study aimed to evaluate the behavior of beef calves during the traditional and rational methods (focusing animal welfare). There were observed of 272 Nelore calves submitted to the proceedings of vaccination, marked and dehorn. During observations was measured the numbers of accidents and/or delay during the proceedings and if there was any difference between male or female. Accident was considered all action that delayed the work and offered any animal or personal risk. Data showed that rational method decrease accidents to animals </span><span>(58 vs. 24, P < 0.05), as well </span><span lang="EN-US">reduced the time lost per animal </span><span>(65.2 </span><span lang="EN-US">seconds vs. 29.8 seconds</span><span>, P < 0.05)</span><span lang="EN-US">. Female calves had more accidents than male calves </span><span>(59% vs. 41%, P < 0.05)</span><span lang="EN-US">. Thus, in conclusion we can affirm that technical animal welfare results in better proceedings and decrease of accidents during proceedings of vaccination, marked and dehorn in calves.</span></em>
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