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<blockquote data-quote="dun" data-source="post: 30210" data-attributes="member: 34"><p>Some big heifers still are hard calvers, some smaller heifers aren't. I don't know what the heretibility of pelvic size is, but there are bulls that throw tiny calves that have daughters that are easy calvers with huge pelvic, and vice versa. Discarding a heifer because she has minus BW is just as wrong (poor chice of words but that's the best I can do) as selecting a bull for extremely high YW and keeping his daughters and hoping for moderate framed cows.</p><p>There are so many outliers in the diverse and antagonistic traits, the entire package needs to be looked at. Just as a great set of EPDs with poor feet and legs is bad, great structure with terrible EPDs is just as bad.</p><p>Visual appraisal, EPDs, pedigree, they're all tools to help select the right heifer or bull. The operative word is "help".</p><p></p><p>dun</p></blockquote><p></p>
[QUOTE="dun, post: 30210, member: 34"] Some big heifers still are hard calvers, some smaller heifers aren't. I don't know what the heretibility of pelvic size is, but there are bulls that throw tiny calves that have daughters that are easy calvers with huge pelvic, and vice versa. Discarding a heifer because she has minus BW is just as wrong (poor chice of words but that's the best I can do) as selecting a bull for extremely high YW and keeping his daughters and hoping for moderate framed cows. There are so many outliers in the diverse and antagonistic traits, the entire package needs to be looked at. Just as a great set of EPDs with poor feet and legs is bad, great structure with terrible EPDs is just as bad. Visual appraisal, EPDs, pedigree, they're all tools to help select the right heifer or bull. The operative word is "help". dun [/QUOTE]
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