An H5N1 outbreak in poultry in Germany, contaminated straw believed to be the source

160,000 birds were culled in Northern Bavaria after H5N1 was confirmed in domestic poultry. Though there is limited details, it's believed that contaminated straw could be the source.

http://www.iht.com/articles/ap/2007/08/27/europe/EU-GEN-Germany-Bird-Flu.php

Though Western European countries often detect H5N1 in wild birds found dead, it's rare to see it in domestic poultry.