Errrrrr, no, the adult teeth aren't all in at 6 or 7 weeks.  (BTW, new
ferrets should ALWAYS get checked by the vet (so that not everyone may have
to later be treated for detectable things like coccidea in case the new one
has it), and also to make sure that teething is progressing properly.
Sometimes a tooth will get stuck in the gums, or might erupt wrong, or a
baby tooth might become entrapped and cause a LOT of teething pain -- and
hence a lot of chewing on things like fingers -- and even abcesses if left
untreated.)  Cheweasels in moderation help with teething chew needs.  Call
up the old FML Ad Issues and you'll find them there, or look in publications
like Modern Ferret.
 
Okay, let's be wild and let 6 weeks equal 42 days, 7 weeks equal 49 days, 8
weeks equal 56 days, 9 weeks equal 63 days, 10 weeks equal 70 days, and 11
weeks equal 77 days.  You get the picture.  Now, compare that with the below
table of typical eruption times for ferret teeth:
 
Upper:
50 days (just over 7 weeks): Canine -- the conical shaped tooth
53 days (7 and 1/2 weeks):  Molar 1 -- the tooth at the back which has a
   bit of flatness to it
60 days (8 and 1/2 weeks):  Premolars 2-4 -- the slicing teeth at the sides
   of the mouth
Lower:
50 days (just over 7 weeks):  Canine and Molar 1
60 days (8 and 1/2 weeks):  Premolar 2
67 days (9 and 1/2 weeks):  Premolar 3
74 days (10 and 1/2 weeks):  Premolar 4 and Molar 2
 
So, the adult teeth typically come in at JUST OVER 7 (SEVEN) WEEKS of age
(or one month and three weeks) through to ALMOST 11 (ELEVEN) WEEKS of age
(or two months and three weeks).  This is well documented and in veterinary
texts (which is what my source is).
 
Oh, and since there has been some confusion on another point of kithood
in the FML.  I have been told by a breeder I know (but do not know from
experience) that ferret eyes are typically still closed till a bit over
four weeks.  Breeders, could you clarify?  What do you see with the eyes?
 
Sukie
[Posted in FML issue 2417]