Conduct marking operations in clean yards close to the paddock being grazed, ideally about two weeks after the last possible lambing date. Appropriate pain relief should be provided. Hygiene is most important for equipment. Prevent flystrike on healing wounds if blowfly strike is likely.
Weaners are particularly susceptible to disease and parasites because their immune systems are not yet fully developed. The additional stresses of separation, handling, transitioning to a forage and/or grain-based diet and naturally low levels of trace minerals can further suppress the immune system. It is important that weaners are protected from disease and parasites so they can express their full genetic potential. In Merino flocks, wean lambs by 14 weeks after the start of the lambing to maximise the amount of time available for ewes to recover body condition before the next joining.
A comprehensive animal health program at weaning can help to optimise growth and development in prime lambs, maiden ewes and wethers by:
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1. Making more from sheep. Module 10: Wean more lambs. Meat & Livestock Australia, 2008. 2. Refer to registered label. 3. Porter, C.J., et al. (2007). Lipids and lipid-based formulations: optimising the oral delivery of lipophilic drugs. Nature Reviews Drug Discovery, 6(3):231. 4. Torchilin, V.P. (2001). Structure and design of polymeric surfactant-based drug delivery systems. Journal of Controlled Release, 73(2), pp.137-172. 5. Rangel-Yagui, C.O., et al. (2005). Micellar solubilisation of drugs. J. Pharm. Pharm. Sci, 8(2):147-163. 6. Virbac data on file. 7. Mundell, L. et al. (2012). Effects of prepartum and postpartum bolus injections of trace minerals on performance of beef cows and calves grazing native range, Professional Animal Scientist, 28:82-88.# 8. Teixeira, A. et al. (2014). Effect of an injectable trace mineral supplement containing selenium, copper, zinc, and manganese on immunity, health, and growth of dairy calves. J. Dairy Sci., 97:4216-4226.# 9. Machado, V. et al. (2013). Effect of an injectable trace mineral supplement containing selenium, copper, zinc, and manganese on the health and production of lactating Holstein cows. Vet. J. 197:451-6.# 10. Berry et al. (2000). Oklahoma State University Animal Science Report, 980:61- 64.# 11. Richeson, J. et al. (2006). Supplemental trace minerals from injection for shipping-stressed cattle. AAES Research Series, 574: 85-88.# 12. Arthington, J. et al. (2014). Effects of trace minerals on measures of performance and trace mineral status of pre- and post-weaned beef calves. J. Anim. Sci., 92:2630-2640. 13. Roberts et al. (2015), J. Anim. Sci., 93:S3.# 14. Palomares, R. et al. (2016). Effects of injectable trace minerals on humoral and cell-mediated immune responses to Bovine Viral Diarrhea Virus, Bovine Herpes Virus 1 and Bovine Respiratory Syncytial Virus following administration of a modified-live virus vaccine in dairy calves. Vet. Immunol. Immunopathol., 178:88-98.# 15. Ball, M. (2016). Trace mineral injection enhances antibody response to botulism vaccination. AVA Proceedings, Adelaide. 16. Hansen (2007), Iowa State University, Department of Animal Science. 17. Pezacka, E., Green, R., & Jacobsen, D. W. (1990). Glutathionylcobalamin as an intermediate in the formation of cobalamin coenzymes. Biochemical and Biophysical Research Communications,169(2), 443-450. #The Multimin formulation in this study contained different levels of minerals compared to the registered formulation in Australia. Some benefits outlined in this document are not registered label claims. Refer to registered label. ®Cydectin, Flukazole, Multimin, Tridectin, Weanerguard and Websters are registered trademarks of Virbac.