This is another use for the brick separator tool but this creation is not built around it. I first started this agility training moc idea and it was quite advanced when I saw it was possible to integrate the Brick Separator in it.
The dogs legs and head can move and it is possible to give them different postures (sit, stand-up and run).
I spent a lot of time on the pipe. I tried various technic options before getting the good one.