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A note on the performance of artificially reared lambs fed cold milk substitute from birth to slaughter

Published online by Cambridge University Press:  02 September 2010

P. D. Penning ,
P. G. E. Bradfield  and
T. T. Treacher
P. D. Penning
Affiliation:
The Grassland Research Institute, Hurley, Maidenhead
P. G. E. Bradfield
Affiliation:
The Grassland Research Institute, Hurley, Maidenhead
T. T. Treacher
Affiliation:
The Grassland Research Institute, Hurley, Maidenhead
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Summary

Two groups of five lambs were removed from their dams within 48 hr of birth and artificially reared to a slaughter weight of approximately 32 kg on a milk replacer given cold, hay and concentrates. Voluntary intake of the feeds was recorded together with growth rates and carcass composition of the lambs.

The two groups of lambs were slaughtered at 58 or 67 days of age with growth rates of 459 and 433 g/day, respectively. The mean milk replacer dry matter consumed per lamb was 34·9 kg and 39·3 kg and concentrate dry matter intakes were 3·1 kg and 4·1 kg. Intakes of hay were negligible. Food conversion efficiencies were 0·70 and 0·67 kg of live-weight gain per kg of dry matter consumed. The mean carcass weights were 18·1 kg and 19·5 kg with mean muscle, bone and fat contents of 48·7%, 16·2% and 35·1 % for lambs slaughtered at 58 days and 48·0%, 14·7% and 37·2% for those slaughtered at 67 days.

Type
Research Article
Information
Animal Production , Volume 13 , Issue 2 , May 1971 , pp. 365 - 368
Copyright
Copyright © British Society of Animal Science 1971

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References

REFERENCES

Large, R. V. and Penning, P. D. 1967. The artificial rearing of lambs on cold reconstituted whole milk and on milk substitute. J. agric. Sci., Camb. 69: 405–409.CrossRefGoogle Scholar
Penning, P. D. 1967. The artificial rearing of lambs. Ann. Rep. Grassld Res. Inst. 1966: 86–92.Google Scholar
Welch, J. G., Vander Noot, G. W. and Gilbreath, R. L. 1963. Effect of feeding milk replacers with varying amounts of fat for hothouse lamb production. J. Anim. Sci. 22: 155–158.CrossRefGoogle Scholar