[Jacob-list] Wobbly lambs and Se

[Robin Lynde]

Several years ago I had two cases of Cu toxicity (determined at necropsy) a year apart. Both occurred within 2-4 weeks of lambing and the affected sheep were mother and daughter and not related to anyone else in the flock. At that time it made me think that there was a genetic component. 
Robin Lynde
Meridian Jacobs
Vacaville, CA 
www.meridianjacobs.com 
  ----- Original Message ----- 
  From: Neal Grose 
  Cc: jacob-list at jacobsheep.com 
  Sent: Friday, March 25, 2011 6:04 PM
  Subject: Re: [Jacob-list] Wobbly lambs and Se


  What we saw here was that the animals showed no evidence of problems until they lambed and started to milk off. The stress of lactation pulls energy resources out of the liver and the liver dumps its load of copper. 

  Sheep with copper toxicity problems generally owe their genetics to base populations from areas with low copper soils. The sheep from these areas lose the ability to excrete copper as self-preservation. 

  Sorta like me and Krispy Kreme donuts.
  Neal

  From: Linda 
  Sent: Friday, March 25, 2011 8:50 PM
  To: Mark Essen 
  Cc: jacob-list at jacobsheep.com 
  Subject: Re: [Jacob-list] Wobbly lambs and Se

  Isn't there acute copper toxicity where a serious overload occurs rather quickly and chronic copper toxicity where a gradual build up in the liver occurs and is released in stress situations? 
  Linda

  On 3/25/2011 8:34 PM, Mark Essen wrote: 
    I would not say that copper always occurs quickly.  When I first started with sheep twenty some years ago, I was pretty ignorant in their requirements.  Since nobody around here (mid Missouri) raised sheep, the feed store was just as ignorant as was I.  I asked the guy at the feed store what to feed and for two years I was feeding cattle feed and mineral to my sheep.  I finally read an article about copper toxicity and realized my mistake.  I also immediately switched feed stores.  My sheep never did show problems, so I am not sure how long it can take for toxicity to occur, but it does not have to be fast.
    Mark Essen
    Famous Acres


      On 3/25/2011 4:36 PM, Zach Oaster wrote: 
        ........

    My reading has suggested that toxicity can occur quickly... so I have been very careful to make sure they never get minerals with copper.

        ^~^~^~^~^~^~^~^~^~^~^
        Zach Oaster
        zach at fattoaster.com
        ^~^~^~^~^~^~^~^~^~^~^
        Visit Zach & Lindsay's farm blog: http://www.fattoasterfarm.com



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