testing of prototype 33:
using the box we designed, in combination with a little rubber ball or a golf-ball in stead of the tennis ball (clicker training)
1. we see a problem: when the dog approaches the box from the wrong direction, the ball isn't fixed well.
2. problem: the red rope turns and twists around the leash: the dog can't detach himself anymore
3. jump up to attach his collar+leash
4.insert the head of the dog in the loop: the rope stays open well!