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Estimating claw health in dairy herds: Can we use routine herd data?
Teaming up for animal health
GD, P.O. Box 9, 7400 AA Deventer, the Netherlands, T. +31 (0)570-63 33 91, F. +31 (0)570-63 41 04
www.gdanimalhealth.com, [email protected]
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GoalDevelopment of an empirical model on routine herd data that could at least classify herds with a below or above average claw health.
ConclusionThe study showed that there is merit in estimating claw health of dairy farms using routine herd data. This provides the opportunity to monitor claw health in a population and classify individual herds for claw health. The claw health status of herds combined with a bench-mark may stimulate herd owners to improve claw health in their herds.
Henriëtte Brouwer1, Thomas Dijkstra1, Heleen Worm1, Yvonne van der Vorst2, Gerdien van Schaik1
1GD Animal Health Service Ltd., Deventer, the Netherlands; 2Dairy co-operative Royal Friesland Campina, Amersfoort, the Netherlands
Material & methods
Results
=
Parameters associated with claw health
200 herd visits
Validation on 50 herds
Principal Component
Classifi cation of herds
Continuous observedclaw health score
Agreement predicted vs. observed claw health
Prediction model:multivariable linear regression on 150 herds
27%
variance in
claw health
explained
specifi city 76% (95% CI 57-90%)
72% herds
correctly
classifi ed
sensitivity 77% (95% CI 46-95%)
Non-ear tagged calf mortality
Replacement rateCattle mortality
Purchase of cattle Certifi ed free
AcknowledgementThis study was fi nanced and supported by the Dairy co-operative Royal Friesland Campina. We would like e to thank the farmers and veterinarians for participation in this study.
contact: [email protected]
Insemination
