Please watch the 4th video, and tell us what you think about it.
In what kind of drive is this dog working? Do you like this kind of barking, or do you prefere a different bark? http://www.imzedrift.com/q_film.htm
NOTHING SPECIAL. I see another nice male gsd sport dog, that has some conflicts (to be in prey or defense) in the hold and bark , that without the conflicts probebly will come out in high prey drive hold and barks.
The dogs bite and prey drive is good, looking at the top few films.
About the bark film........at first he keeps a distance before going in to bark at the manworker........looks a bit like he starts off in defence then goes into prey drive. First few barks with the spin around seem high and thats why I thought more defence drive