You're right. I used to own a ferret. Once when my infant granddaughter was asleep in her bassinette, the ferret jumped in with her and started to bite her face. Thank God I was right there and grabbed him away. Needless to say, said ferret had a new home pronto.
....Meant to add the fact that ferrets are very jealous. All the attention my new granddaughter was getting apparently PO'd the ferret.