Risk factors for death and unwanted early slaughter in Swiss veal calves kept at a specific animal welfare standard

Bähler, Corinne; Steiner, Adrian; Luginbühl, A.; Ewy, A.; Posthaus, Horst; Strabel, D.; Kaufmann, Thomas; Regula, Gertraud (2012). Risk factors for death and unwanted early slaughter in Swiss veal calves kept at a specific animal welfare standard. Research in veterinary science, 92(1), pp. 162-168. Association for Veterinary Teaching and Research Work 10.1016/j.rvsc.2010.10.009

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Calf losses (CL, mortality and unwanted early slaughter) in veal production are of great economic importance and an indicator of welfare. The objective of the present study was to evaluate CL and the causes of death on farms with a specific animal welfare standard (SAW) which exceeds the Swiss statutory regulations. Risk factors for CL were identified based on information about management, housing, feeding, and medication. In total, 74 production cohorts (2783 calves) of 15 farms were investigated. CL was 3.6%, the main causes of death were digestive disorders (52%), followed by respiratory diseases (28%). Factors significantly associated with an increased risk for CL were a higher number of individual daily doses of antibiotics (DDA), insufficient wind deflection in winter, and male gender. For administration of antibiotics to all calves of the cohort, a DDA of 14-21 was associated with a decreased risk for CL compared to a DDA of 7-13 days.

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