>I noticed he wasn't eating/drinking/pooping.  was very very dark brown
>(almost black) and like liquid.
 
To Christine.
 
In my experience keeping a great number of ferrets, I always keep some
antibiotics on hand.  Your description in isolating him for observation is
the routine I use, even for a few day's.  In this case I would start
immediately with 1/4 cc Clavulox syrup (modified Amoxylin) 3x- day for 3
day's and thereafter 2x-day.  Most ferrets love the taste of this product
and will cause no stress.  If after about 3 day's there is no improvement,
the situation will have to be reassessed, but if there is some improvement
do NOT stop the medication to soon it could mean a relapse later on.
 
All the best  from BILL
[Posted in FML issue 1333]