I would like to know how many litterboxes you have out.  If only one.
Chances are she is going to poop different places.  If she is playing and
then realizes I gotta go.  She is heading to the most convenient spot.
One way of solving this would be to put more litterboxes down.  Someone
may have the ferret that will search out the one litterbox..  But, I
consider that lucky.  When I had litterboxes down in the ferret room I
had 12 because there were 12 ferrets.  Each particular about whatever.
You may want to put down more litterboxes.  I have always liked Yesterday
News.  I use it for different animals.
 
Hope this helps.
Benita
[Posted in FML issue 3775]