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2 days no water
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<blockquote data-quote="greybeard" data-source="post: 1585264" data-attributes="member: 18945"><p>I'd be leery about letting them in to unlimited water after 3 days-water intoxication can kill them.</p><p></p><p>From Lucky_P:</p><p><em>Producer had penned 15 cows & fall-born calves in the barn on Wed night, and held them there 'til about noon on Thursday - 97F high/79F low that day, with high humidity - with no access to water overnight. Turned them out into a 2-acre lot with shade and water. 3 hours later when they looked, all 15 were dead. Brain sodium levels on the two I necropsied were in the range of 4200 ppm; normal range is 800-1200 ppm. </em></p><p><em></em></p><p><em>In those sorts of conditions, without constant access to water, cattle become dehydrated via urination and panting. When these dehydrated cattle were allowed free-access to water after their confinement, they really tanked up. Water crosses the blood-brain barrier much more rapidly than does sodium, so the elevated sodium levels in the brain 'sucks in' water so rapidly that the brain swells - and there's not much 'wiggle room' inside that bony cranium. Death ensued pretty rapidly.</em></p><p></p><p>https://cattletoday.com/forum/viewtopic.php?f=7&t=104224&p=1340031</p></blockquote><p></p>
[QUOTE="greybeard, post: 1585264, member: 18945"] I'd be leery about letting them in to unlimited water after 3 days-water intoxication can kill them. From Lucky_P: [i]Producer had penned 15 cows & fall-born calves in the barn on Wed night, and held them there 'til about noon on Thursday - 97F high/79F low that day, with high humidity - with no access to water overnight. Turned them out into a 2-acre lot with shade and water. 3 hours later when they looked, all 15 were dead. Brain sodium levels on the two I necropsied were in the range of 4200 ppm; normal range is 800-1200 ppm. In those sorts of conditions, without constant access to water, cattle become dehydrated via urination and panting. When these dehydrated cattle were allowed free-access to water after their confinement, they really tanked up. Water crosses the blood-brain barrier much more rapidly than does sodium, so the elevated sodium levels in the brain 'sucks in' water so rapidly that the brain swells - and there's not much 'wiggle room' inside that bony cranium. Death ensued pretty rapidly.[/i] https://cattletoday.com/forum/viewtopic.php?f=7&t=104224&p=1340031 [/QUOTE]
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