Home Videos German Shepherd Genetics with Avi Cohen, Steve Stoops, Pierre Wahlström, Johannes Grewe German Shepherd Genetics with Avi Cohen, Steve Stoops, Pierre Wahlström, Johannes Grewe admin Feb 12, 2022 comments off Tweet on Twitter Share on Facebook Pinterest Protein Mix-Ins To Help Your Dog's Nutrition All Natural Pet Treats avi cohen dog genetics Dog training dogs genetics of dogs German shepherd genetics german shepherd puppies GSD ipo Johannes Grewe pierre wahlstrom protection dogs puppies Robert Cabral schutzhund steve stoops what to look for in German shepherds working dogs