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Negative $EN
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<blockquote data-quote="Stickney94" data-source="post: 1617677" data-attributes="member: 37941"><p>I'm sure you will get some different opinions on this one. The angus defintion is:</p><p></p><p><em>"Cow Energy Value ($EN), expressed in dollar savings per cow per year, assesses differences in cow energy requirements as an expected dollar savings difference in daughters of sires. A larger value is more favorable when comparing two animals (more dollars saved on feed energy expenses). Components for computing the cow $EN savings difference include lactation energy requirements and energy costs associated with differences in mature cow size."</em></p><p></p><p>If I read that correctly $EN factors milk production and cow size. So, do you trust the milk production data? </p><p></p><p>I know a favorite bull of mine, Hoover Dam, at one time was -25, then was positive +7, iirc, and now looks to be -$5. </p><p></p><p>The AAA also created the $M index. Which I will let someone else explain.</p><p></p><p>I do still look at $EN. I'd prefer not to be -50. I'm not super concerned about -$30.</p><p></p><p>If your -$40 cow weans off a calf that is 100 lbs heavier than a $0 cow, does that pay for the difference?</p></blockquote><p></p>
[QUOTE="Stickney94, post: 1617677, member: 37941"] I'm sure you will get some different opinions on this one. The angus defintion is: [i]"Cow Energy Value ($EN), expressed in dollar savings per cow per year, assesses differences in cow energy requirements as an expected dollar savings difference in daughters of sires. A larger value is more favorable when comparing two animals (more dollars saved on feed energy expenses). Components for computing the cow $EN savings difference include lactation energy requirements and energy costs associated with differences in mature cow size."[/i] If I read that correctly $EN factors milk production and cow size. So, do you trust the milk production data? I know a favorite bull of mine, Hoover Dam, at one time was -25, then was positive +7, iirc, and now looks to be -$5. The AAA also created the $M index. Which I will let someone else explain. I do still look at $EN. I'd prefer not to be -50. I'm not super concerned about -$30. If your -$40 cow weans off a calf that is 100 lbs heavier than a $0 cow, does that pay for the difference? [/QUOTE]
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