I wouldn't worry about the crayon!
 
As a kid I used to feed boxes of them to my sister's Lasa Apso (sp?)
and that dog pooped technicolor!  Crayons are *supposed* to be edible,
otherwise they wouldn't be given to children.
 
Ferrets are made of tougher stuff :)
 
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   Harpy -aka Tara Wheeler   /  /         \         email - [log in to unmask]
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[Posted in FML issue 1249]