My experience is only with with about five at the dog park, but those were not really prey-driven by anything.
They liked to wander and were not really 'activated' by much of anything except an occasional random sprint without any external pack 'impetus'.
Just go to 100% full speed randomly.

Totally calm. Zero aggression towards humans and other dogs. They sleep 20 hours per day. Perfect.

They seem to be an exceptional breed...but not long-lived and those few had some 'neurotic problems' which I'm not sure of.

Finally got him to the dog park this week.
Other dogs more interested in him than he was
To them. He was more interested in the people and hoping for head scratches. Was amazing to see him run. Big hundred yard circles. Then came home and went to sleep.
http://forums.pelicanparts.com/uploa...1554488861.jpg

It's tiresome to watch 'em run :)

Oh and I turned back the other day and he jumped in the carhttp://forums.pelicanparts.com/uploa...1554489056.jpg
http://forums.pelicanparts.com/uploa...1554489056.jpg

I loved my grey! Big black with white markings. Seriously HUGE grey, he weighted 96 pounds. Vet said Zorro was the biggest grey he had ever seen. Loved children. Every kid in the neighborhood was initially terrified of the giant black dog until they pet him. He would just lean in for a cuddle.

Zorro would play chase/catch in the backyard with a yellow shop rag. He would run full blast, throw it in the air, then double back and grab it on the run again. Couldn't believe how fast he could accelerate. Set of wheels!

angela