This man is absolutely amazing.

He handles ~10 dogs simultaneously with whistle command only...

In this image he positioned some of his dogs in a straight line
and used two other dogs to 'slalom' the flock through them. The dogs
given the stay command will quiver with excitement and anticipation
but will not move...

well worth a visit - look Leault farm up on the internet if visiting the
Aviemore area - its worth it...