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SHELBURNE FARMS LAMB FEEDING TRIAL
Phoebe GarfinkelSam (Shepherd) SmithChet ParsonsEd JacksonRachel GilkerElaine Burnor
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Research made possible by:Shelburne Farms andConservation Fund
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Lambs have been traditionally finished in confinement on grain
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Shelburne Farms hasan ample supply of grass
Shelburne Farms cheeseis made from milk fromtheir dairy herd of Brown Swiss dairy cows
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Results of forage test on the dairy cow pasture from 2005
Sid Bosworth, UVM and Nat Bacon, Shelburne Farms
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Why not feed some of this grass to lambs?
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Divided the lambs into three equal groups
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Groups were randomly selected
• Raised by ewe
• Raised with a bottle
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One group was put in confinement and fed grain.
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The other two groups were put on pasture
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Both groups on pasture were provided with water, minerals and shade; and one group was provided with whole shell corn.
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The lambs were weighed every two weeks
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AVERAGE TWO WEEK GAIN
0.0
2.0
4.0
6.0
8.0
10.0
12.0
June 22 July 6 July 20
Po
un
ds Pasture plus corn
Pasture
Confinement
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LAMB WEIGHTS
4045505560657075
6/2/
2006
6/9/
2006
6/16
/2006
6/23
/2006
6/30
/2006
7/7/
2006
7/14
/2006
DATE
LB
S
G/Corn
Grass
Confine
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Total mean weight gain per sheep in pounds.
• Grain Fed 39.8A
• Pasture Only 31.6B
• Pasture Plus Corn 29.0B
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Concentrate Pasture Plus Corn Pasture Only
Feed costs 429.31 87.41 0
Yardage/land use fees 22.80 50.00 50.00
Labor 157.50 168.75 168.75
Cost per lb.of gain 1.44 0.78 0.55
Costs
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Cost Per Pound of Gain
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
Pasture Pasture plus corn Confinement
$
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Pasture Walk
Explained MIGFencing
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Live Lamb Grading Workshop
Compare degree of finish on lambs
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Taste Testing
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Taste Testing
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Taste Testing
Some considered taste. Others justate.
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Taste Testing
No significant differencebetween groups;it was all good.
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What did we learn?
• Lambs need to be taught to graze?
• Corn– Period to get acclimated to it– Limit the amount they receive??
• Parasites on pasture
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What did we learn?
• Grain– More expensive but quicker– Excessive fat if taken to a heaver weight?
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What did we learn?
• Grass fed lamb appeared to be comparable to grain fed in taste test– Keep in mind it was excellent grass
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