The Relationship Between Disease Occurrence, Feeding Management and Return Over Feed in Ontario Dairy Herds

Authors

  • C. McLaren University of Guelph, Department of Population Medicine, Guelph, Ontario
  • K. Lissemore University of Guelph, Department of Population Medicine, Guelph, Ontario
  • K. Leslie University of Guelph, Department of Population Medicine, Guelph, Ontario
  • T. Duffield University of Guelph, Department of Population Medicine, Guelph, Ontario
  • D. Kelton University of Guelph, Department of Population Medicine, Guelph, Ontario
  • B. Grexton Ontario Dairy Herd Improvement Corporation

DOI:

https://doi.org/10.21423/aabppro20044977

Keywords:

management, production-limiting disease, milk production, herd economic, Return over Feed Index

Abstract

On a worldwide basis, dairy industries of most countries are becoming increasingly concerned with factors that impact return on investment. Historically, research has focused on the relationship between management, production-limiting disease and milk production. However, few studies have quantified their association with herd economics.

The objectives of this research are to examine the relationship between profitability as measured by the Ontario Dairy Herd Improvement (DHI) Corporation's Return over Feed (ROF) index, and herd characteristics such as milk production, somatic cell count linear score and health management practices. The ROF index will also be used to assess on-farm health and disease information that includes lameness, clinical ketosis, clinical mastitis, retained placenta (RP), displaced abomasum (DA), milk fever, monensin use and ration particle size. Herd level incidence risks for subclinical ketosis and subclinical mastitis will be evaluated by using the California Mastitis Test and the KetoTestO ketone test in early postpartum cows. Subsequently, the associations between the risk of disease, management factors and ROF will be determined.

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Published

2004-09-23

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