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Low input sheep trials NZ ,
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<blockquote data-quote="Global ovine" data-source="post: 7663177" data-attributes="member: 493"><p>[USER=151839]@sheepdogtrail[/USER]; your having carried out numerous lung inspections would have you soon noticing Pneumonia lesions and their Pleurisy footprint as we see in NZ.</p><p>What our sheep in NZ suffer is caused by a different association of "bugs" than what is seen in the UK, hence Heptovac was not effective enough to use in NZ as it is in the UK.</p><p>Instead of a soft pink colour of normal lung tissue, the affected regions are liver coloured and may occupy large parts of either or both lobes. Affected lambs stop eating, have a fever and stand around with their head lowered. When badly affect they cannot be moved and death is inevitable.</p><p>Most lambs recover, but may experience up to a month of nil growth being reduced to an "air frame".</p><p>Recovered animals will have pleurisy lesions sticking the lung tissue to the internal lining of the thorax. This lowers the value of the carcass.</p><p>A very cold and wet spell of weather (or any other severe stress) may tip previously affected animals, yet apparently healthy, to die suddenly. More common in rams than ewes.</p><p></p><p></p><p>Regarding your very low FECs; do you breed your own rams, or do you source them from numerous breeders? If the latter, I suggest the low numbers are due to environmental reasons as few breeders worldwide breed for Parasite Resistance. If you breed your own and select on low FECs and culling those that exceed a given threshold, you will be achieving low FEC goals genetically.</p></blockquote><p></p>
[QUOTE="Global ovine, post: 7663177, member: 493"] [USER=151839]@sheepdogtrail[/USER]; your having carried out numerous lung inspections would have you soon noticing Pneumonia lesions and their Pleurisy footprint as we see in NZ. What our sheep in NZ suffer is caused by a different association of "bugs" than what is seen in the UK, hence Heptovac was not effective enough to use in NZ as it is in the UK. Instead of a soft pink colour of normal lung tissue, the affected regions are liver coloured and may occupy large parts of either or both lobes. Affected lambs stop eating, have a fever and stand around with their head lowered. When badly affect they cannot be moved and death is inevitable. Most lambs recover, but may experience up to a month of nil growth being reduced to an "air frame". Recovered animals will have pleurisy lesions sticking the lung tissue to the internal lining of the thorax. This lowers the value of the carcass. A very cold and wet spell of weather (or any other severe stress) may tip previously affected animals, yet apparently healthy, to die suddenly. More common in rams than ewes. Regarding your very low FECs; do you breed your own rams, or do you source them from numerous breeders? If the latter, I suggest the low numbers are due to environmental reasons as few breeders worldwide breed for Parasite Resistance. If you breed your own and select on low FECs and culling those that exceed a given threshold, you will be achieving low FEC goals genetically. [/QUOTE]
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