31
Every calf born at Sydenstricker Genetics is weighed with a scale. That is the
weight reported on AHIR, and in the performance information listed in this sale book.
Many breeders, however, use an estimated birth weight determined by measuring
the calf’s heart girth, and then use a chart to convert that heart girth measurement to
pounds. We taped the heart girth of every calf born on the farm in the spring of 1999,
and compared it to the calf’s actual weight. We found the tape to be fairly accurate up
to about 83 pounds. After that, the calves tended to weigh much more than their heart
girth measurement would indicate.
For example, in 1999, our highest birth weights using the tape were only 92
pounds, and there were only two that were that high. Those two calves actually
weighed 104 and 110 pounds. In the entire calf crop, there were actually 65 calves
with birth weights of 92 pounds or more.
So what’s our point? There’s actually four points we’d like to make.
1)
Although customers who have bought bulls here for many years appreciate
our use of true scale weights, new customers are sometimes shocked by our birth
weights. We know in some instances that is because they are used to looking at
estimated (taped) birth weights rather than true scale weights.
2)
We are not totally opposed to the use of estimated (taped) birth weights. It’s
better than nothing, and we appreciate how much easier it is to measure the heart
girth, rather than wrestling the calf into some kind of sling, and hoisting him up while
trying to read the scale as he’s bouncing around trying to get away, all the while
you’re also trying to watch for the mother pawing and bellowing behind you! Besides,
the body circumference might have as much to do with calving ease as the weight,
but the correlation between birth weight and calving ease is well proven.
3)
All we ask is that you compare apples to apples. If you’re comparing these bulls
to bulls from a herd that uses estimated tape weights, you need to know that the
same calf will “weigh” differently in each herd.
4)
In actuality, we recommend you not use a scale weight or an estimated weight
very much in your selection decisions. The BW EPD is a much better indicator of
what’s in the calf genetically, and in natural calves, his own birth weight has been
factored into his BW EPD. Studies have shown EPDs to be as much as nine times
more accurate than ratios or raw weights as a selection tool.
While we’re on the subject…
While we are firm believers in breeding heifers to low BW EPD bulls, it seems to
us our breed has gotten a bit carried away with the concept, when breeding mature
cows. Our experience is that a big, stout calf at birth is usually the big, stout calf at
weaning, as long as there is no problem at birth. Remember that a +8 BW EPD Angus
bull is equivalent to a +2.8 BW EPD Simmental or a -0.6 BW EPD Charolais, accord-
ing to the 2012 Across-Breed EPDs of the U.S. Meat Animal Research Center. Also,
an old University of Missouri study showed that cows will naturally try to produce a
calf that weighs about 7% of her own body weight. Seven percent of a 1,000-pound
cow is 70 pounds, but 7% of a 1,500-pound cow is 105 pounds.
Estimated Birth Weights
CW
MARB
RE
FAT
I+25
I+.21
I+.21
I+.047
SydGen 0079 Sandy 2150
Birth Date: 1-19-2012
Bull 17212841
Tattoo: 2150
✭
✭
Unique outcross pedigree with considerable maternal strength.
✭
✭
Maternal brothers have sold for $3,500 to John Thies, Perry, MO and $2,750 to
Darrell and Martha Shriver, Elk Creek, MO.
✭
✭
Maternal sisters have sold to C/S Cattle Co., Pomona, MO and Alford Cattle Co.,
Caldwell, TX.
Kenny’s Creek Sandy S15
Te Mania Knight K206
SydGen Sandy 0079
Kennys Creek Federation Q140
+16617322
+Sinclair Majesty 939 16
#
+Sinclair Net Present Value
+Majesty 939 of 5439 4286
#
+Boyd New Day 8005
#
AAR New Trend
CSC 8005 Traveler 613
SVF Forever Lady 57D
15452608
CSC Bonanza Traveler 359
+Bubs Bonanza BB G53
CSC Maximum Traveler 199
61
BW RATIO WW RATIO SALE DAY WT
ADG
PROJ YW
FRAME
100
119
683
101
5-106
5-102
2-103
2-100
2-93
2-122
2-118
BWR
WWR
YWR
IMF
UREA
RBFT
RPFT
Dam
Progeny
Record
-3
.19
+5.0 .33 +50 .21 +91
.12
I+.80 .05 I+10
+19.95
+45.41
N/A
-1
+25
CED
BW
WW
YW
SC
DOC HP CEM MILK
$W
$B
CW
MARB
RE
FAT
I+26
I+.39
I+.54
I+.015
SydGen 0079 Sandy 2212
Birth Date: 1-28-2012
Bull 17219422
Tattoo: 2212
✭
✭
Sire was a featured bull in our 2010 sale to Panther Creek Ranch, Bowen, IL, and
used back in our program for his maternal strength and outcross pedigree.
✭
✭
Maternal brothers are in service at Chateau Enterprises, Carson, IA; Mershon
Farms, Lees Summit, MO; and Jake Owen, Maysville, MO.
✭
✭
Dam came to us from 2S Angus, Seneca, MO.
Kenny’s Creek Sandy S15
Te Mania Knight K206
SydGen Sandy 0079
Kennys Creek Federation Q140
+16617322
+Sinclair Majesty 939 16
#
+Sinclair Net Present Value
+Majesty 939 of 5439 4286
#
Connealy Lead On
#
Connealy Leadtime
2
S 9794 Miss Executive 716
Eligence Plus of Conanga
15770367
+2S Lady 1407 Design 8-402 #Bon View New Design 1407
#
Circle A Executive 5101
62
BW RATIO WW RATIO SALE DAY WT
ADG
PROJ YW
FRAME
94
112
628
93
4-105
4-99
2-107
2-93
2-107
2-115
2-114
BWR
WWR
YWR
IMF
UREA
RBFT
RPFT
Dam
Progeny
Record
-1
.20
+3.6 .33 +47 .21 +85
.13
I+.77 .05 I+16
+23.58
+61.95
N/A
+1
+27
CED
BW
WW
YW
SC
DOC HP CEM MILK
$W
$B
CW
MARB
RE
FAT
I+32
I+.54
I+.35
I+.024
SydGen In Sure 2145
Birth Date: 1-18-2012
Bull +17218907
Tattoo: 2145
✭
✭
With some of the lowest BW EPDs in the entire offering, this pair should be very
“
heifer friendly.”
✭
✭
Half brothers sell as Lot 63, and their dam is featured as Lot 6.
#
Mytty In Focus
[
RDF]
#
SAF Focus of ER
Connealy In Sure 8524
Mytty Countess 906
16205036
Entreena of Conanga 657
#
Connealy Onward
Entity of Conanga 5657
#
+Sinclair Net Present Value #N Bar Prime Time D806
Sinclair Majesty 939 16
+Ideal 4465 of 6807 4286
+15491039
+Majesty 939 of 5439 4286
#
Ideal 5439 of 1418 2455
EE 4286 of Ideal 2240 1254
64
B
BW RATIO WW RATIO SALE DAY WT
ADG
PROJ YW
FRAME
70
88
627
93
2-102
2-103
1-115
8-92
8-105
8-101
8-90
BWR
WWR
YWR
IMF
UREA
RBFT
RPFT
Dam
Progeny
Record
I+12 .05 -2.8 .36 +40 .26 +84
.19
I+.81 .05 I+18
+28.59
+67.07
N/A I+11 +27
CED
BW
WW
YW
SC
DOC HP CEM MILK
$W
$B
CW
MARB
RE
FAT
I+18
I+.47
I+.31
I+.021
SydGen Mandate 2233
Birth Date: 1-30-2012
Bull +17212860
Tattoo: 2233
✭
✭
Flush brothers to the heifer calf selling as Lot 6A.
✭
✭
Dam was one of the most sought-after females of the Fall 2008 sale season in
Missouri, with her excellent phenotype and outcross pedigree, and is offered
today as Lot 6.
✭
✭
Her first son produced here, a maternal brother to these bulls, is the sire of Lots
61
and 62.
✭
✭
Selling half interest and full possession in Lot 63B.
#
SS Objective T510 0T26
#
SS Traveler 6807 T510
SydGen Mandate 6079
SS Miss Rita R011 7R8
15337433
SydGen Gina 4235
+SAF Focus J30
Inniway Ms New Design 201
#
+Sinclair Net Present Value #N Bar Prime Time D806
Sinclair Majesty 939 16
+Ideal 4465 of 6807 4286
+15491039
+Majesty 939 of 5439 4286
#
Ideal 5439 of 1418 2455
EE 4286 of Ideal 2240 1254
63
B
BW RATIO WW RATIO SALE DAY WT
ADG
PROJ YW
FRAME
85
106
731
108
2-102
2-103
1-115
8-92
8-105
8-101
8-90
BWR
WWR
YWR
IMF
UREA
RBFT
RPFT
Dam
Progeny
Record
I+9 .05 +.8
.37
+59 .29 +109 .23 I+.53 .05 I+9
+32.49
+57.90
I+6.7 I+6 +33
CED
BW
WW
YW
SC
DOC HP CEM MILK
$W
$B
CW
MARB
RE
FAT
I+18
I+.47
I+.31
I+.021
SydGen Mandate 2228
Birth Date: 1-30-2012
Bull +17212859
Tattoo: 2228
BW
RATIO WW
RATIO ADG YW
RATIO
ADJ SC
ADJ HIP
92
114 660
98
63
A
I+9 .05 +1.9 .37 +54 .29 +103 .23 I+.53 .05 I+9
+28.51
+57.33
I+6.7 I+6 +33
CED
BW
WW
YW
SC
DOC HP CEM MILK
$W
$B
CW
MARB
RE
FAT
I+32
I+.54
I+.35
I+.024
SydGen In Sure 2144
Birth Date: 1-18-2012
Bull +17218908
Tattoo: 2144
BW
RATIO WW
RATIO ADG YW
RATIO
ADJ SC
ADJ HIP
70
86
600
89
64
A
I+12 .05 -2.8 .36 +39 .26 +83
.19
I+.81 .05 I+18
+28.02
+66.99
N/A I+11 +27
CED
BW
WW
YW
SC
DOC HP CEM MILK
$W
$B
Sinclair Majesty 939 16
Sells as Lot 6
Dam of Lots 63 and 64
Grandam of Lots 61 and 62
