From: Phil Payne 

> The disease takes years to develop. Does anyone know how old this cow was
that was
> killed on Dec 9 2003 and found to be positive for the mad cow prions? Do cows
live
> for 6 whole years before being slaughtered? I'd have expected a shorter
period of time.

Somewhere I've read that it was five years old.

--
  Phil Payne
  http://www.isham-research.com
  +44 7785 302 803
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