FEED BUNK HEIGHT IMPACT ON DAIRY COW‘S FRONT CLAWS

Authors

  • VICTOR CIACO DE CARVALHO Veterinary, FEAGRI – UNICAMP. Cx.P. 60 11, Campinas, SP, Brazil.
  • MARIO MOLLO NETO Production Engineer. FEAGRI – UNICAMP. Cx.P. 60 11, Campinas, SP, Brazil.
  • SILVIA REGINA LUCAS DE SOUZA Animal Scientist. FEAGRI – UNICAMP. Cx.P. 60 11, Campinas, SP, Brazil.
  • PAOLO VENTURI Animal Scientist. Post Graduate student – University of Bologna, Italy.
  • IRENILZA DE ALENCAR NÄÄS Engenheiro Civil. FEAGRI – UNICAMP. Cx.P. 60 11, Campinas, SP, Brazil.

DOI:

https://doi.org/10.18011/bioeng2009v3n1p01-08

Keywords:

lameness, animal welfare, feed bunk design

Abstract

Claw horn lesions are believed to develop from increased pedal bone mobility induced by changes in the corium tissue. During the planning of barns herd owners are faced with choices of materials and dimensions, as well as feed bunk heights. Among the causes that may lead to front claw injuries there is the height of the feed bunk, as the cow changes its postural behavior in order to reach the food. This research aimed to study the dairy cows’ front claws force exerted during eating for determining
the lesion risk factor of the feed bunk height. Eight dairy cows were placed in front of the feed bunk, their front claws stepped on the pressure assessment system, and the forces exerted on front claws due to the eating postural change were recorded. The mean pressure, the maximum pressure, the floor contact area, and the mean force per region were calculated. While the cow was eating, the highest mean pressure shifted slightly towards the sole. In the lateral claw the maximum pressure
was also shifted slightly towards the toe. No difference was found in the variables analyzed for both lateral and medial sides, as well for the force distribution in the left and right claws. Results of this experiment were not conclusive, not allowing explaining either laminitis or the corkscrew deformity as a result of the force exerted in the claws by means of height of the feed bunk being a risk factor.

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Published

2009-04-15

How to Cite

CARVALHO, V. C. D.; MOLLO NETO, M.; SOUZA, S. R. L. D.; VENTURI, P.; NÄÄS, I. D. A. FEED BUNK HEIGHT IMPACT ON DAIRY COW‘S FRONT CLAWS. Revista Brasileira de Engenharia de Biossistemas, Tupã, São Paulo, Brazil, v. 3, n. 1, p. 01–08, 2009. DOI: 10.18011/bioeng2009v3n1p01-08. Disponível em: https://seer.tupa.unesp.br/index.php/BIOENG/article/view/54. Acesso em: 17 oct. 2021.

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