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Implementation of a Claw Health Index in The Netherlands

Implementation of a Claw Health Index in The Netherlands. Jos Buiting Manager CRV Herdbook. Content. Why Claw Health… Model and Parameters Feedback to farmers Implications and Conclusions. Content. Why Claw Health… Model and Parameters Feedback to farmers

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Implementation of a Claw Health Index in The Netherlands

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  1. Implementation of a Claw Health Index in The Netherlands Jos Buiting Manager CRV Herdbook

  2. Content • Why Claw Health… • Model and Parameters • Feedback to farmers • Implications and Conclusions

  3. Content • Why Claw Health… • Model and Parameters • Feedback to farmers • Implications & Conclusions

  4. Why Claw Health... • Claw Health is major issue in Dairy Cattle • 70% of Dutch cows have a claw disorder • at least at one of the 4 claws • Claw health data is routinely scored since 2006 • enables breeding value estimation

  5. Claw disorders I • Sole Haemorrhage • Zoolbloeding • Digital Dermatitis • Mortellaro • Interdigital Dermatitis • Stinkpoot • source: Animal Health Service

  6. Claw disorders II • Sole Ulcer • Zoolzweer • Interdigital hyperplasia • Tyloom • White Line Disease • Witte lijn deffect source: Animal Health Service

  7. Prevalence

  8. Content • Why Claw Health… • Model and Parameters • Feedback to farmers • Implications & Conclusions

  9. Data for Breeding Value EstimationApril 2010 • Claw Health scores • October 2006-February 2010 • Feet & Leg Conformation score (data since 1998) • If rear leg: rear view / side view is available 1,905,702 records in total 1,735,315 conformation scores 170,387 claw health scores 105 hoof trimmers

  10. Model and Parameters • Multi-trait animal model including 17 traits • 6 claw disorders • in 2 lactation groups • parity 1 and parity 2+ • 5 feet & leg conformation traits • Rear Leg Rear View • Rear Leg Side View • Foot Angle • Locomotion • Feet & Legs

  11. Model... • Corrects for: • age at calving (heifers) /parity (cows) • stage of lactation • heterosis / recombination • herd - test day- classifier (conformation data) • herd - testdate (claw data) • hooftrimmer-half year (claw data) • permanent environment (claw data) • animal

  12. … and Parameters

  13. Is it real?Claw scores are!!

  14. Content • Why Claw Health… • Model and Parameters • Feedback to farmers • Implications & Conclusions

  15. Digiclaw / data collection

  16. Digiclaw / Farmreport

  17. Claw Health Relative Farm Score

  18. Prevelance per group of last hoof trimming

  19. Registered claw diseasesper animal

  20. Claw History per animal

  21. Bulls to avoid on Claw Health

  22. Top bulls on Claw Health

  23. Content • Why Claw Health… • Model and Parameters • Some Numbers • Implications & Conclusions

  24. Implications • Average Breeding Value Claw Health = 100 • BV 101 saves: € 1,25 / cow / year • Bull with 110 gives € 12,50 • Farm with 100 cows saves € 1.250 per year • Economic impact Claw Health relative to production • based on genetic variation: • Production : Claw Health ~ 6 : 1 • Adjusted for reliability • Production : Claw Health ~ 8 : 1

  25. Conclusions Claw Health is: • Economically Important • Claw Health traits are heritable • Variation between bull’s EBV present • Improving Claw Health requires Claw Data • Claw health is not the same as feet & legs • genetic correlation 0,50 - 0,60 • Claw Health is a breeding value in progress • First Breeding values published April 2010 • Data collection will improve in time

  26. Thanks for your attention

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