A Through is a set up move
Set Up Moves are tricks that are used to establish timing and position in disc dog freestyle. Traditional tricks include: Around, Through, Backwards Through, and Scoot, but any or all of your tricks,... where the dog runs between the handler’s legs.
The dog can move from front to back or side to side and can even weave.
A Through can be done in both the clockwise and counter clockwise directions.