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From the outset of forming a fresh cow group both Harry and Chris were conscious that they were experiencing fewer problems during this period and as the cows were moved it was very clear that the condition on the whole was good. In respect of fertility it is obviously too early to make too many comments although according to Harry and Chris bulling activity was far greater than it had been in the past.
The feeding of a lower protein ration to the fresh cow holds down the early production of high yields but when these animals are moved on to a higher protein ration they are in a good state to produce the extra milk without drawing on body reserves. The extra protein is also likely to boost intakes.
By studying the routine monthly recordings the extent of the response can be seen clearly (Table 2). The average yield increase from the first recording, which was on average day 13 after calving, and the second recording was 7.7 litres. Table 2 also gives the separate response for cows and heifers and as expected the yield increase for cows is more dramatic. Heifers normally have a much flatter lactation curve but it is still important to maintain condition in early lactation.
Whereas cows should not lose excessive condition in early lactation it is also important the cow in late lactation should not become fat. Whereas the fresh cow ration has a lower protein to limit milk production a stale cow should be on a ration where the protein content must not fall in order to avoid these cows becoming too fat.
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