Eyes call for emergency appointments.

Cataracts can develop fast but shouldn't affect appetite, though I
could be wrong.

There might be chemical damage, infection, or if the eye is swelling or
hard there might be a cataract in the wrong position so it is causing
glaucoma, too. That second one does cause enough pain to affect
appetite.

Veterinary Ophthalmologists:

http://www.acvo.com/

http://www.asvo.org/

Sukie (not a vet)

Recommended ferret health links:
http://pets.groups.yahoo.com/group/ferrethealth/
http://ferrethealth.org/archive/
http://www.afip.org/ferrets/index.html
http://www.miamiferret.org/fhc/
http://www.ferretcongress.org/
http://www.trifl.org/index.shtml
http://homepage.mac.com/sukie/sukiesferretlinks.html

[Posted in FML 6083]