Hi Mia,
Sorry to hear of your troubles, but god bless you for having such a big
heart and taking these poor little ones in.
 
Have you considered a full check up for the aggressive one?  Maybe she
just doesn't feel good.  Not to scare you, but doesn't adrenal disease
sometimes make ferrets aggressive?
 
Hope all will be well soon,
suzi
[Posted in FML issue 4238]