Two On. Two Off. Here's a picture of Mike demonstrating the correct position that I have named "spot," as in hit your spot.
I require that my dogs perform a 2o2o position on the teeter and dog walk. I've always had Brisco do a running contact on the A-frame. I think the slamming into the ground would cause him injury to his shoulders. He just didn't have the strength in his back end to mitigate damages.
Cosi is a different story. He's so fast that I'm worried he will launch himself off the A-frame if I don't require a bottom position. Right now he's required to do a 2o2o. I'm re-thinking this criteria and may change him to either a stop or a down at bottom of the frame.
Which do you require?