When the V is attached to the dog's neck, it's difficult in using,
and rather uncomfortable for the dog.
But when the V-slot is attached to the wheelchair,
a whole other situation is created. The dog has to put the
ball in a box to attach himself to the wheelchair. So for the dog
it is more like a game!
Thanks to the input of Caroline, we found a new goal for a prototype.
It will be used in a different context, with other handlings.