Breeding Criteria - Size &
Scale - S.I.L - Purchasing Rams
Advancing Sire potential using measured
The only aspect of a sires
performance that will influence its offspring, is its breeding (its
S.I.L is used to provide the performance data
required by our Clients.
For more info on S.I.L - see below
- Stock must live and survive a challenging
All stock must prove their
worth in this difficult environment providing us with
a natural selection process.
Genetic Trend Graphs
2015 Graphs - Click here
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Viewed as PDF file - 107kb
Size & Scale
Year - 2016
- Ewes to the Ram = 192
MA Ewes - 110 to Ram
2TH Ewes - 43 to Ram
Ewe Hoggets - 39 to Ram
Rams put to the Ewes
Val d'Or 159/10
(FS 1.2) - Sire =
Val d'Or 238/11
(TN)(tw) - Sire = Goldstream
Goldstream 143/12 (TP) - Sire = Collie
d'Or 207/15 (FS 2.3)- Sire = Goldstream 143/12
blue tag #
for the full Sire Pedigree.
For Sire History back to 2001,
including full sire pedigree's refer to
'Past Val d'Or Sires' -
Key to Abbrev's
(tw) = Twin
(TP) = Tested Pedigree for Spider Syndrome
(TN) = Tested Normal for Spider Syndrome
(F.---) = Registered Flock Number
(FS #-#) = Foot Score - 1 = Lowest possibility of foot issues | 5 = Highest
possibility of foot issues
Val d'Or S.I.L # - 165
- The only aspect of a sires performance
will influence its offspring, is its breeding (its genes).
The best way to measure a sires genetic potential
is to measure the individual traits together with its complete family history.
For this intensive task we use the Sheep Improvement Ltd (S.I.L) Genetic Engine.
See the S.I.L. Website for more info -
All Stud stock are performance recorded using S.I.L.
recorded trait groups are -
From these trait groups, S.I.L creates several other
Terminal Sire Overall (TSO)
Terminal Sire Growth (with meat) (TSGm)
Terminal Sire Meat (with growth) (TSMg)
Terminal Sire Survival (TSS)
For more information about Breeding Values (BVs) refer to
Explanation of BV -
Frequently asked Questions about S.I.L
1. Why is this small ram rated more highly for growth than
that large ram I want to buy? I’d never buy a small ram when growth of my
lambs is so important.
2. I want to improve lambing percentage and I only buy twin-born
rams. Someone told me this was wrong. How can a single-born ram be any good?
Click here for
Purchasing Val d'Or
here for an example on using Performance
Data to pick the best sheep.
How do I select a Suffolk ram using the S.I.L TSO Index's, BV's
How can I identify a really good
Val d'Or Suffolk ram?
Is personal inspection
necessary to select the Suffolk rams I would like to buy?
For the answers go to Purchasing Rams
"an important factor - use it as much as possible"
See "400 Plus
- A guide to Improved Lamb Growth" Edited by Peter Kerr. Published by
N.Z. Sheep Council
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May 03, 2016