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<blockquote data-quote="Doc" data-source="post: 4362052" data-attributes="member: 71986"><p>PD of your cows is fundamental to profitability. Why would you feed and house an empty cow? Surely it's like ploughing half a field or not milking some of your dairy herd. </p><p>In terms of PD errors. The accuracy of PD in cattle is very good, particularly with ultrasound for early pregnancy. You really want the cows to be at least 6 weeks from last service opportunity. The NCPD scheme in Aust has been running since the early 1990's. It's a system of registered tail tags, colour coded for - empty, less than 4 moths, over 4 months. The Vets need to pass a competency test to get a registration number, which is on the tags and performance is constantly monitored. Registration is withdrawn for poor performance. The error rate is extremely low.</p></blockquote><p></p>
[QUOTE="Doc, post: 4362052, member: 71986"] PD of your cows is fundamental to profitability. Why would you feed and house an empty cow? Surely it's like ploughing half a field or not milking some of your dairy herd. In terms of PD errors. The accuracy of PD in cattle is very good, particularly with ultrasound for early pregnancy. You really want the cows to be at least 6 weeks from last service opportunity. The NCPD scheme in Aust has been running since the early 1990's. It's a system of registered tail tags, colour coded for - empty, less than 4 moths, over 4 months. The Vets need to pass a competency test to get a registration number, which is on the tags and performance is constantly monitored. Registration is withdrawn for poor performance. The error rate is extremely low. [/QUOTE]
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