Short communication

Herd-level variables associated with overmilking in Michigan dairy herds

R. Moore-Foster, B. Norby, Rebecca Schewe, R. Thomson, P. C. Bartlett, R. J. Erskine

Research output: Contribution to journalArticle

Abstract

The objective of this study was to determine the herd-level variables that are associated with overmilking in 64 Michigan dairy herds with a mean herd size of 451 cows (range: 59–2,771 cows). Participating producers completed surveys to indicate their mastitis management practices and attitudes. Additionally, milking protocols were observed and milk flow dynamics for 3,824 cows were estimated using digital vacuum recorders. The median duration of overmilking was 47 s (95% confidence interval, CI: 38.6 to 55.9 s), with a mean of 55% (95% CI: 49.5 to 61.1%) of cows within each herd overmilked by at least 30 s. Median milking time for all herds was 324 s (95% CI: 302 to 346 s) and was found to be positively correlated with median duration of overmilking (r = 0.670). Backward multivariate analysis was used to determine which of 45 herd-level milking and management variables were associated with median duration of overmilking. Median duration of overmilking was negatively associated with the duration of time needed to complete 1 milking for the entire herd (adjusted R2 = 0.13). Herds that operate milking facilities below maximum daily capacity may be prone to overmilking. Given the low coefficient of determination, variables unaccounted for in this study, such as equipment function or manual detachment by milking operators, are likely the most important risk factors for overmilking.

Original languageEnglish (US)
JournalJournal of Dairy Science
DOIs
StatePublished - Jan 1 2019

Fingerprint

milking
dairy herds
herds
Communication
Mastitis
Practice Management
Vacuum
duration
cows
Milk
Multivariate Analysis
Confidence Intervals
Equipment and Supplies
operator regions
herd size
multivariate analysis
mastitis
confidence interval
risk factors
milk

Keywords

  • labor management
  • milking protocol
  • overmilking

ASJC Scopus subject areas

  • Food Science
  • Animal Science and Zoology
  • Genetics

Cite this

Short communication : Herd-level variables associated with overmilking in Michigan dairy herds. / Moore-Foster, R.; Norby, B.; Schewe, Rebecca; Thomson, R.; Bartlett, P. C.; Erskine, R. J.

In: Journal of Dairy Science, 01.01.2019.

Research output: Contribution to journalArticle

Moore-Foster, R. ; Norby, B. ; Schewe, Rebecca ; Thomson, R. ; Bartlett, P. C. ; Erskine, R. J. / Short communication : Herd-level variables associated with overmilking in Michigan dairy herds. In: Journal of Dairy Science. 2019.
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