Sheep and diets
Feedlot rations can be either Total Mixed Rations (TMR) in which the ingredients are
mixed together loosely, or pellets. In this practical we will compare the performance of
Merino wethers fed two commercial pellets provided by Milne Feeds
(www.milne.com.au/). Lambs fed the Lambgro Pellets will also be offered high quality
chaff ad libitum during the first 5 days. There will be four feedlots with 30 lambs in each
• Feedlot 6: LambGro pellets
• Feedlot 7: EasyOne pellets
• Feedlot 8: LambGro pellets
• Feedlot 9: EasyOne pellets
The approximate nutritional requirements of lambs are indicated in Table 1.
Table 1. Crude protein requirements (CP %) of balanced rations with different
metabolisable energy (ME, MJ/kg DM) for lambs of various liveweights.
(20 kg Lwt)
(30 kg Lwt)
(40 kg Lwt)
13 18.2 17.5 16.8
12 16.5 15.8 13.8
11 14.5 13.5 11.0
10 12.8 11.8 9.2
Please note that there are some variations on the recommendations provided in this
table, but the general principles apply.
The lambs will be sourced from the Merino Lifetime Productivity Project
(www.wool.com/MLP) which is managed by Murdoch staff and conducted at the UWA
Research Farm located near Pingelly, Western Australia. The lambs are the progeny
of ewes generated from leading industry sires representing a wide range of genetic
selection for wool and carcass traits. They were born in June 2020 and shorn in
Scientific use of animals for research or teaching undertaken by Murdoch University
staff or students must complete with the requirements of the Australian Code of
Practice for the Care and Use of Animals for Scientific Purposes. This must be taken
seriously as it is a criminal offence if animals under our care fail to receive humane
and proper treatment. If any animal welfare issues are suspected, then unit staff must
be contacted urgently regardless of day or week or time of day; Dr Andrew Thompson
(0437 316 117) or Dr Serina Hancock (0403 570 823)
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