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<blockquote data-quote="regolith" data-source="post: 916112" data-attributes="member: 9267"><p>Okay, what I did was make three new groups in my database, one for HolsteinFriesian 14/16ths or more n=8, one for Jersey 14/16ths or more n=36 and one for crossbreds F10J6 to J10F6 n=56. Cows that fall outside those breed mixes were excluded - Ayrshire crosses, Brown Swiss crosses, 3/4 bred crossbreds and anything that looked like it had incorrectly recorded parents.</p><p>They were herd tested four times since calving and the averages are as follows:</p><p></p><p>14 Sep 2011</p><p>Friesian 21.2 litre 4.9% Fat 3.7% Protein SCC 175</p><p>Crossbred 14.7 litre 5.3% Fat 3.6% Protein SCC 71</p><p>Jersey 13.4 litre 5.9% Fat 3.8% Protein SCC 131</p><p></p><p>14 Nov 2011</p><p>Friesian 23.3 litre 3.8% Fat 3.5% Protein SCC 647 (2 of the 8 were over a million)</p><p>Crossbred 17.5 litre 4.7% Fat 3.9% Protein SCC 78</p><p>Jersey 15 litre 5.2% Fat 4.1% Protein SCC 110</p><p></p><p>26 Jan 2012</p><p>Friesian 22.8 litre 4.2% Fat 3.7% Protein SCC 202</p><p>Crossbred 15.5 litre 5.3% Fat 4.1% Protein SCC 98</p><p>Jersey 14.3 litre 6% Fat 4.4% Protein SCC 144</p><p></p><p>18 Mar 2012</p><p>Friesian 21.6 litre 5% Fat 3.8% Protein SCC 121</p><p>Crossbred 16.2 litre 5.9% Fat 4.2% Protein SCC 71</p><p>Jersey 14.1 litre 6.8% Fat 4.4% Protein SCC 104</p><p></p><p>The lower SCC of the crossbreds is influenced by the number of 2 yr olds in the group - 22 of the 58. The heifers have been completely unaffected by the mastitis that plagued the cows coming back from lease and nearly all have had an extremely low SCC on every herd test.</p><p>What happened to drop the fat so much in November I don't know? I finished feeding PKE at the end of October and that is the only herd test where they were on grass alone - they started the turnip crop on 22 Dec. At the September herd test they were downright starving getting about 5 kg DM PKE and 8 or 9 kg DM pasture per head per day. November they would have been allocated 17 - 18 kg DM all grass and the production was increasing - peaked/plateaued in early Dec.</p></blockquote><p></p>
[QUOTE="regolith, post: 916112, member: 9267"] Okay, what I did was make three new groups in my database, one for HolsteinFriesian 14/16ths or more n=8, one for Jersey 14/16ths or more n=36 and one for crossbreds F10J6 to J10F6 n=56. Cows that fall outside those breed mixes were excluded - Ayrshire crosses, Brown Swiss crosses, 3/4 bred crossbreds and anything that looked like it had incorrectly recorded parents. They were herd tested four times since calving and the averages are as follows: 14 Sep 2011 Friesian 21.2 litre 4.9% Fat 3.7% Protein SCC 175 Crossbred 14.7 litre 5.3% Fat 3.6% Protein SCC 71 Jersey 13.4 litre 5.9% Fat 3.8% Protein SCC 131 14 Nov 2011 Friesian 23.3 litre 3.8% Fat 3.5% Protein SCC 647 (2 of the 8 were over a million) Crossbred 17.5 litre 4.7% Fat 3.9% Protein SCC 78 Jersey 15 litre 5.2% Fat 4.1% Protein SCC 110 26 Jan 2012 Friesian 22.8 litre 4.2% Fat 3.7% Protein SCC 202 Crossbred 15.5 litre 5.3% Fat 4.1% Protein SCC 98 Jersey 14.3 litre 6% Fat 4.4% Protein SCC 144 18 Mar 2012 Friesian 21.6 litre 5% Fat 3.8% Protein SCC 121 Crossbred 16.2 litre 5.9% Fat 4.2% Protein SCC 71 Jersey 14.1 litre 6.8% Fat 4.4% Protein SCC 104 The lower SCC of the crossbreds is influenced by the number of 2 yr olds in the group - 22 of the 58. The heifers have been completely unaffected by the mastitis that plagued the cows coming back from lease and nearly all have had an extremely low SCC on every herd test. What happened to drop the fat so much in November I don't know? I finished feeding PKE at the end of October and that is the only herd test where they were on grass alone - they started the turnip crop on 22 Dec. At the September herd test they were downright starving getting about 5 kg DM PKE and 8 or 9 kg DM pasture per head per day. November they would have been allocated 17 - 18 kg DM all grass and the production was increasing - peaked/plateaued in early Dec. [/QUOTE]
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