[Jacob-list] certified scrapie free

[Betty Berlenbach]

Laura, Cheryl, et al,

If the only way you can tell if a sheep has scrapie is through examing its brain when it's dead, how can a flock be certified scrapie free?  I'm just curious as to the process.  I know that the mandatory scrapie program simply has people record who got sold to whom and keep records, in case, when randomly checking for scrapie, they come across a sheep that has it and can then, track it back.  But I'm not entirely sure how the voluntary program works in such a way that it can certify a flock scrapie-free?  All explanations welcome.
 Betty, in Vermont,who now has a blog, thanks to help from Walter and Linda.  See Betty's blog at http://sheepwoman.wordpress.com.
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