Dog Walker

See link for inspiration of this Idea. You fit your dog with an exoskeleton that has various servo-motors and computer control. At predetermined regular times it walks the dog through the pet door, outside the house, to various locations (onboard artificial intelligence learns from experience) where the dog would take care of certain business.

The machine could be equipped with an automatic scooper/bagger unit. Also, a supply of fragrance (skunk is one possibility) can "overmark" the place the dog just marked, to encourage doing more business later at the same location.