Sure do.  You can tell by the "Emergency" 4"x5" poster on front door (found
in pet stores) that says (check one) ___ Dog ___ Cat live here to notify
emergency medical services (can you say fire department?).  You have to
write in FERRETS with a permanent marker.  On the back door I have typed a
poster that says "Please be aware of 2 pet ferrets.  I was told fire
personnel go to the breaker box to cut off power before entering a home, and
the box is at the back door.
[Posted in FML issue 1477]