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A Discussion About EPDs
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<blockquote data-quote="Frankie" data-source="post: 379441" data-attributes="member: 13"><p>I'm not sure where you're going here.</p><p></p><p>1. EPDs aren't the silver bullet for anything. They're simply a way to compare traits of breeding animals against other animals. Only the traits that can be measured, BW, WW, etc, have EPDs. Some breeds have EPDs for Disposition; some don't. I don't know how you actually measure Vigor. Conformation and Doability are strictly opinions and I don't believe there will ever be an EPD for them. Angus has a Yearling and Mature Frame Score. I'm surprised that Herefords don't.</p><p></p><p>2. Allowing the breeder to manipulate the data on his cattle is not an answer to anything, IMO. EPDs aren't based on one or two or three animals, at least Angus EPDs. They're based on performance records of dams, sires, sibs, half sibs, uncles, aunts, etc. The more data, the more accurate the EPD, but it's <strong>always</strong> the EXPECTED Progeny Difference.</p><p></p><p>3. If EPDs don't work for you, fine. But they work for a lot of people who use them the way they're intended, not as the "final answer" to a breeding question. It seems to me that what you're proposing is simply another version of EPDs.</p><p></p><p>4. EPDs are not "predictions of FUTURE progeny<strong> compared to the average animals in the breed</strong>". Averages change with every sire summary. EPDs should be used to compare one breeding animal to another, not the breed average.</p><p></p><p>If you meant this for Hereford breeders only, let me know and I'll delete this post.</p></blockquote><p></p>
[QUOTE="Frankie, post: 379441, member: 13"] I'm not sure where you're going here. 1. EPDs aren't the silver bullet for anything. They're simply a way to compare traits of breeding animals against other animals. Only the traits that can be measured, BW, WW, etc, have EPDs. Some breeds have EPDs for Disposition; some don't. I don't know how you actually measure Vigor. Conformation and Doability are strictly opinions and I don't believe there will ever be an EPD for them. Angus has a Yearling and Mature Frame Score. I'm surprised that Herefords don't. 2. Allowing the breeder to manipulate the data on his cattle is not an answer to anything, IMO. EPDs aren't based on one or two or three animals, at least Angus EPDs. They're based on performance records of dams, sires, sibs, half sibs, uncles, aunts, etc. The more data, the more accurate the EPD, but it's [b]always[/b] the EXPECTED Progeny Difference. 3. If EPDs don't work for you, fine. But they work for a lot of people who use them the way they're intended, not as the "final answer" to a breeding question. It seems to me that what you're proposing is simply another version of EPDs. 4. EPDs are not "predictions of FUTURE progeny[b] compared to the average animals in the breed[/b]". Averages change with every sire summary. EPDs should be used to compare one breeding animal to another, not the breed average. If you meant this for Hereford breeders only, let me know and I'll delete this post. [/QUOTE]
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