Here is the ferret poop chart, maybe this will help.....
 
Green poop - a very non-specific sign - it just means that food is moving
through too fast.  The normal brown color seen in feces is the end
product of breakdown of old red blood cells.  The pigment goes through
a green stage called biliverdin, before it becomes brown (called
stercobilin).  So if it is going through at an accelerated rate, it
never breaks all the way down, and has a green color to it.  Anything
that accelerates passage of food or causes diarrhea can result in green
color - ECE, rapid food changes, lymphoma, just about anything.
 
Black tarry poop - Very suggestive of gastric bleeding and usually
associated with gastric ulcers.  You have to have significant bleeding in
the stomach for the feces to turn black.  The black color is the result
of digestion of blood, which usually only occurs in the stomach.
 
Bloody poop - If you see frank blood in the poop - it is usually either
from the large bowel or rectum ( if seen in small amounts) - of if there
is a lot of blood, it could come from the entire length of the GI tract.
Massive hemorrhage is seen either from severe gastric bleeds or shock in
ferrets, and as one might imagine, is a really bad sign.
 
Birdseed poop - Generally a sign of maldigestion or malabsorption.  Also
non-specific, it can be seen with any disease that severely affects the
small intestine.  Most commonly seen with ECE, the individual seeds are
usually undigested fat and starch complexes.  When you see this, you
should consider removing a ferret from kibble and going to a bland,
easily digested supplement for a while.
 
Pencil-lead thin stools - Think partial obstruction - usually a foreign
body.
 
Kris
[Posted in FML issue 3901]