I love the treadmill! Just ask a SK9T Dog.
We have been training so many dogs on the treadmill this week, it is mandatory training with every dog that comes onto property. All dogs in the board and train program learn and it also gives all of the dogs to also work on other commands while dogs are on the treadmill.
My trainers at my board and train are so resourceful and skilled that they can work 4 dogs at once...each dog learning what is expected of them.