“WARNING: Ferrets asleep in a washing machine may look cute but…Washing machines can KILL ferrets. ALWAYS check laundry and washer BEFORE turning on washing machine/dryer, if your ferrets have access to the machines. Better to check than to have a life long regret. Each year ferrets are killed because they were in their deep ferret sleep and their owner /ferrant didn’t realize the ferret was in there. : ( ” quote via Diane van Weelie
Same goes for dishwashers. Better safe than sorry.