I think that is considered seediness, and if persistent could mean
malabsorbtion of food.But being so infrequent may not be a problem.
Here are two (believe it or not!) stool charts to help stay informed (-:

Risa

http://groups.msn.com/ferretlovers/poopchart.msnw

http://www.ferret-fact.org/HealSymPoop.htm

[Posted in FML 6093]