Deleted
Deleted Member
Posts: 0
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Post by Deleted on Aug 21, 2014 8:28:59 GMT -6
Always wondered why there isn't some recognition for tighter curves. Ya a dod is neat deal but for every dod there is a 95 in her contemporary too. Instead of incentive to breed outliers why not some to breed overall consistency. I mean it doesn't make sense to have a herd 100's? I realize I was starved a little O2 when was born but that's more how I think?
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tlmcr
Fresh Calf
Posts: 74
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Dod
Aug 22, 2014 5:57:43 GMT -6
Post by tlmcr on Aug 22, 2014 5:57:43 GMT -6
I totally agree. The ideal herd shouldn't have any DOD but all cattle in a very tight performance range. At least that's my reasoning for never having a DOD
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Dod
Aug 22, 2014 22:23:57 GMT -6
Post by strojanherefords on Aug 22, 2014 22:23:57 GMT -6
Well in an ideal herd should all the calves should ratio 110. The big problem with the DOD program is it penalizes the small efficient cow. Here is an example herd with cows of equal efficient in converting TDN to pounds at weaning: Cow Weight | Maintenance TDN | Weaning Weight | WWR | % of body weight weaned | 1,000 lbs. | 9.3 lbs./Day | 465 lbs. | 87 | 46.5% | 1,100 lbs. | 10 lbs./Day | 500 lbs. | 93 | 45.5% | 1,200 lbs. | 10.8 lbs./Day | 540 lbs. | 101 | 45.0% | 1,300 lbs. | 11.4 lbs./Day | 570 lbs. | 106 | 43.8% | 1,400 lbs. | 12.1 lbs./Day | 605 lbs. | 111 | 43.2% |
In this example each calf weaning weight is proportional to the amount of feed the cow needs for maintenance. As you can see the weaning weight ratio under estimates the efficiency of a small cow and the percentage of calf weaned under estimates the efficiency of a larger cow. Additionally, a larger cow can consume more feed in relation to her requirements than a smaller one. That being said there are certain antagonisms between large cows and fertility, so I do not care a great deal about mature cow size.
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