Effect of continuous suckling/”ewe-rearing” and supplementation on growth performance of pasture-raised Katahdin lambs S.L. Rastle-Simpson, K.N. D’Souza,

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Presentation transcript:

Effect of continuous suckling/”ewe-rearing” and supplementation on growth performance of pasture-raised Katahdin lambs S.L. Rastle-Simpson, K.N. D’Souza, A.K. Redhead, Q. S. Baptiste, M. Knights Division of Animal and Nutritional Sciences, West Virginia University, Morgantown, WV

Traditional Weaning  Common management practice  3-4 months of age  Reduce metabolic demand on the dam  –BCS to recover  –Earlier resumption of postpartum reproductive cycles  Lambs placed into feedlots  Psychological and nutritional stress  Compromise growth, immune function, and welfare of lambs  –Retardation of growth in lambs up to 6 months of age  Leads to overall decline in productivity

Continuous Suckling  Lower susceptibility to parasitism  –Reduced worm burden  –Whether continuous suckling can reduce parasitism under field conditions has yet to be determined  Increased pre-slaughter growth rates  –Depression in growth rate of early weaned lambs

Markets  Increase in demand and price for lighter (<100 lbs.) market lambs in the Northeast.  Market weights can potentially be achieved by 3-5 months of age  Lambs can be finished on pasture while suckling without being placed in a fattening facility

Objective  Determine the effect of continuous suckling with and without supplementation on the growth rate of lambs

Experimental Design  Spring born lambs months of age  All animals were on pasture for the entire experiment (3 months)  Supplemented lambs received ad libitum access to 16% crude protein lamb pellets  Lambs were weighed approximately every two weeks Weaned No supplement Weaned Supplemented Suckling Supplemented Suckling No supplement

b a a b

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Conclusions  Both suckling and supplementation independently improve growth performance of pasture-raised lambs.  -Gain per period  -Final weights  Continuous suckling improved the overall ADG of lambs.

Further Research  We will be starting a repeat of this trial this spring.  Some of the supplements will be provided.  If interested please contact Stephanie. Stephanie Simpson Phone: