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In 1987, an ecopathology survey was carried out in 160 French dairy farms in order to specify lesions typical of laminitis and heelhorn erosion and to assess their risk factors. Three podal affections were characterized: chronic laminitis; subacute laminitis; and heelhorn erosion. Concerning the building for livestock, the risk factors of heelhorn erosion(More)
This study aimed at quantifying on a large scale the risk of both three-week-return-to-service and late-return-to-service for dairy cows according to the BVDV-infection status of the herds. Three-week- and late-returns-to-service were defined as a repeat service occurring respectively from 19 to 25 days and after 25 days following a first or a second(More)
In 1987, an ecopathology survey was carried out in 160 French dairy farms. Its primary objective was to clinically characterize laminitis and heelhorn erosion in order to identify the risk factors of these affections. A total of 4,896 cows were individually monitored. Observation of podal lesions of each cow allowed us to identify associations between(More)
The emergence of a new hereditary disease, called "Complex vertebral malformation" (CVM), has been described in Holstein cattle population. This paper studied the incidence of mating concerning Holstein dairy cattle with CVM in Brittany and the possible influences of CVM status for sires and dams on return-to-service at different intervals post-service in(More)
The objective of the current study was to quantify the change in the prediction of dry matter intake (DMI) resulting from the inclusion of rumination time (RT) in the 2001 National Research Council (NRC) DMI prediction model. Forty-one Holstein cows fed the same total mixed ration were involved in a 10-wk study. Individual DMI were measured daily. The(More)
An ecopathological survey was conducted between 1987 and 1989 in 116 French herds with 3,590 cows in order to study the risk factors for infertility linked to calving. Based upon an analysis model of etiological interactions, the complementary use of a logistic model and factorial analysis followed by classification allowed demonstration of the direct and(More)
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