>Ferrets open their eyes during the fifth week.  Not before that.  Some are
>still in "pop eye" stage until the end of the fifth week.
 
Hi, I do not know what's up with your U.S.  ferrets but in 35 years in
ferret breeding I have yet to see all the kits eyes not open within 23
days, normally 20-21.  At this age they are feeding on raw meat, eggs and
full cream milk.  Chris.
[Posted in FML issue 3022]