Photos of Werner & Gertrud Biewer Gertrud and her Yorkshire Terriers on the doggy ramp at the house in Hirschfeld. The Biewers had about 70 dogs in total.These guys could be the great-grandparents of our BiewersWerner & Gertrud Biewer at the campground in SpainGertrud Biewer at the Campground in Spain 1 2 3 4 5 Rate this envira Karen Hansen @Rocky Mountain Biewer Terriers You can text me at (970)882-3299.