I find Basenji boys are worse than the girls when it comes to pooping. Bungwa has to have a steep bank (we've plenty of those). Miggy has to find a particular spot but it changes from day to day and if he can't find it he just doesn't 'go'. He can wait for hours and hours. Arrow likes a tarmacked road and again waits until we walk over one (we have to make a special journey for that). Their dad, Ama, like Bungwa needed a bank.
Never tried matching but know several people who do.