I hear tell very little training involved. All natural for the breed.
About 9 minutes into the video if you fast forward.
Real terriers dont run from vermin as coyote decoy dogs, they close, fight and kill or die trying.
Good luck finding a real Jagd, Patterdale, Pit, Working Irish, Kerry Blue or Drahthaar to run FROM a coyote!!
Airedales are indeed a failure as this blog so aptly demonstrates, but feed whatever breed you wish.