>I would check for possible access to the broiler part of your oven.  In
>my old apartment, there was a hole large enough for ferrets to get in,
>and Slinky and Kyle went in and got their whiskers burned off by the
>pilot light.
 
If Aileen is right and that is cause, Rachel, then work out some sort of
barrier to keep them out of the kitchen.  There have in the past been
some reports of ferrets killed by gas when it was this accessible.
[Posted in FML issue 3133]