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Prepartum and Postpartum Feed Restrictions Affect Blood Metabolites and Hormones Reducing Colostrum and Milk Yields in Fat-Tailed Dairy Sheep. | LitMetric

AI Article Synopsis

  • This study explored the impact of limiting feed before and after lambing on fat-tailed dairy sheep regarding their body weight, blood metabolites, hormones, colostrum, and milk production.
  • 20 pregnant ewes were divided into control and feed-restricted groups, with the restricted group having lower dry matter intake but no significant change in body weight.
  • Feed restriction led to increased concentrations of certain blood metabolites and hormones, while it resulted in lower colostrum and milk yields without altering milk composition.

Article Abstract

This study aimed to investigate the effect of prepartum and postpartum feed restriction on body weight (BW), blood metabolites, and hormones as well as colostrum and milk yields and compositions in fat-tailed dairy sheep. In this study, 20 multiparous and pregnant ewes were randomly allocated to either the control (Ctrl; = 10) or the feed-restricted (FR; = 10) groups from week -5 to week 5 relative to parturition. Despite dry matter intake being decreased in the FR group compared to the Ctrl throughout both prepartum and postpartum periods, no differences in BW were detected between groups in any of the studied periods. Feed restriction increased both free fatty acids and beta-hydroxybutyrate concentrations during both prepartum and postpartum periods. Similarly, feed restriction increased triglyceride concentration postpartum. Additionally, feed restriction increased insulin and growth hormone and decreased prolactin concentrations during both prepartum and postpartum periods. Feed restriction caused a decreased colostrum yield and a relative increase of the main colostrum components in the FR group. Similarly, milk yield decreased in the FR group compared to the Ctrl group, although milk components were not affected. In conclusion, feed restriction did not affect BW but decreased colostrum and milk yield in fat-tailed dairy sheep.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8146321PMC
http://dx.doi.org/10.3390/ani11051258DOI Listing

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