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Weight to age chart
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<blockquote data-quote="Nesikep" data-source="post: 1254805" data-attributes="member: 9096"><p>A few years ago I regularly weigh taped all my calves every 2 weeks.. Some would grow in spurts, and some had very steady growth.. One heifer in particular was VERY steady, so I plugged it all into Excel and got a formula which I use to compare the weight of all other calves... </p><p>Calves tend to put on more weight in the first month than the 5th if the feeding regime is similar, so I came up with this</p><p></p><p>-0.002 * Age^2 + 3 * Age + BW</p><p>Basically is says that they start off gaining 3 lbs a day, and every day they gain .002 lbs less, so that at 200 days they're gaining 2.6 lbs</p><p>This yields what I consider about my minimum requirements for a replacement heifer.. 600 lbs @205 days</p><p></p><p>Here's what it works out to.. week by week with an 80 lb birthweight</p><p>7 100.902</p><p>14 121.608</p><p>21 142.118</p><p>28 162.432</p><p>35 182.55</p><p>42 202.472</p><p>49 222.198</p><p>56 241.728</p><p>63 261.062</p><p>70 280.2</p><p>77 299.142</p><p>84 317.888</p><p>91 336.438</p><p>98 354.792</p><p>105 372.95</p><p>112 390.912</p><p>119 408.678</p><p>126 426.248</p><p>133 443.622</p><p>140 460.8</p><p>147 477.782</p><p>154 494.568</p><p>161 511.158</p><p>168 527.552</p><p>175 543.75</p><p>182 559.752</p><p>189 575.558</p><p>196 591.168</p><p>203 606.582</p><p>210 621.8</p><p>217 636.822</p></blockquote><p></p>
[QUOTE="Nesikep, post: 1254805, member: 9096"] A few years ago I regularly weigh taped all my calves every 2 weeks.. Some would grow in spurts, and some had very steady growth.. One heifer in particular was VERY steady, so I plugged it all into Excel and got a formula which I use to compare the weight of all other calves... Calves tend to put on more weight in the first month than the 5th if the feeding regime is similar, so I came up with this -0.002 * Age^2 + 3 * Age + BW Basically is says that they start off gaining 3 lbs a day, and every day they gain .002 lbs less, so that at 200 days they're gaining 2.6 lbs This yields what I consider about my minimum requirements for a replacement heifer.. 600 lbs @205 days Here's what it works out to.. week by week with an 80 lb birthweight 7 100.902 14 121.608 21 142.118 28 162.432 35 182.55 42 202.472 49 222.198 56 241.728 63 261.062 70 280.2 77 299.142 84 317.888 91 336.438 98 354.792 105 372.95 112 390.912 119 408.678 126 426.248 133 443.622 140 460.8 147 477.782 154 494.568 161 511.158 168 527.552 175 543.75 182 559.752 189 575.558 196 591.168 203 606.582 210 621.8 217 636.822 [/QUOTE]
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