If you have 2-3 dogs it is already a real pain taking them for a walk. The lines are crossed all the time and it is a true test of your patience.
What if you have a lot of dogs and they all want and need little daily exercise? You could build an army of drones to take your dogs for a walk, like this guy did or you can build an outdoor gym with treadmills for dogs.
Dan Berber is the man who owns all these dogs and he has ten treadmills to keep the dogs in good shape. Very clever and unique take to keep the dogs active and fit.