This is another song having a bit of fun with those who take protection sports a bit too seriously. In the spirit of the immortal Tom Lehrer, who is my humor hero. Lehrer's song "Fight Fiercely , Harvard" was a facetious football fight song. So this is a facetious Schutzhund fight song.
 
"Fass", which litterally means "hold" or "take hold" , is the conventional command in Schutzhund for the dog to bite the decoy, also called the "bad guy" or the "helper" (because he helps the judge to test the dog), who receives the bite on a padded sleeve. "Out" or "aus" is the command to let go , ie to stop biting. Schutzhund (like French Ring Sport) is really the canine equivalent of karate : training for a ritualized fight that in theory gives you the skills for the real thing if the need should ever arise. Or as Jorrocks might have said, "Schutzhund is the image of war, with none of its guilt and only one percent of its danger."