Evaluation of the Effects of a Monensin Overdose on Health, Feed Intake, Milk Yield, and Milk Composition in Early Lactation Holsteins

Authors

  • David McClary Elanco Animal Health, Greenfield, IN
  • John Kube Elanco Animal Health, Greenfield, IN
  • Howard Green Elanco Animal Health, Greenfield, IN
  • Elvin Thomas Elanco Animal Health, Greenfield, IN
  • John Wilkinson Elanco Animal Health, Greenfield, IN
  • Gerald Mechor Elanco Animal Health, Greenfield, IN

DOI:

https://doi.org/10.21423/aabppro20074597

Keywords:

Monensin, milk production efficiency, mixed ration, overdose, dry matter intake, milk yield

Abstract

Monensin (M) (Rumensin®:Elanco) is approved for use in lactating and dry dairy cattle for improved milk production efficiency. The labeled dose for M in a total mixed ration (TMR) is 11-22 gm/f dry matter (DM) fed continuously. M is safe for cattle when fed according to label directions but mixing errors can occur and lead to an overdose (OD) and possibly debilitating or fatal consequences. The objectives of this study were to determine the impact of a lOX OD on dry matter intake (DMI) and milk yield (MY), observe the signs associated with a lOX OD, determine if cows acclimated to M responded differently to OD compared to M nai:ve cows, and determine if recovery was affected by inclusion of Min the post OD diet.

Cover image of the 40th Conference Proceedings: A single longhorn standing next to a barbed-wire fence on a cloudy day. Yellow background.

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Published

2007-09-20

Issue

2007

Section

Research Summaries 2

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