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- W2003196114 abstract "This paper presents estimates of the relative impacts on reproductive status, the incidence of mastitis, and milk production of different types of veterinary service programs. The effects of veterinary services, categorized as emergency, scheduled and mixed, were modeled as a recursive system in which services affect herd health and health affects milk output. Veterinary services also affect milk output directly. Estimates are based on a small sample of dairies from the Tulare milkshed of California, and attention is concentrated on obtaining accurate data and addressing conceptual problems in modeling the effects of veterinary services. The data were pooled over dairies and months. Multiple regression was used to estimate production or yield functions for measures of herd reproductive health, under health, and milk. The data were corrected for autocorrelation and heteroskedasticity in the regression residuals. Student's t-statistic was used for test of significance. The estimated yield equations were used to calculate changes in health and milk output from changes in veterinary services. Currently available measures of herd reproductive status may not be valid for measuring reproductive health, because they confound management decisions with health status. Available data on udder health are satisfactory. The relative effects of different veterinary service programs were found to differ according to the aspects of herd performance being examined, and it may be important to account for indirect effects of scheduled services that are manifested through management." @default.
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- W2003196114 title "Measuring the impact of different veterinary service programs on dairy herd health and milk production" @default.
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- W2003196114 doi "https://doi.org/10.1016/0167-5877(85)90017-0" @default.
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