...disaster^2 + ln(misplaced ornaments)
 
To answer Christine Code's question, it doesn't matter what kind of tree
you get, the fuzz busters will find a way to get into it and wreak havoc
as they see fit.  Even artifical trees may be no good.  If it's something
they haven't seen in awhile (like since the last, X-MAS) your fuzzies
will want a closer look.  Perhaps you can get two trees:  one small one
for the ferrets to destroy and one for you to decorate.  Make sure they
know which is which.
 
Good luck
[Posted in FML issue 1407]