natural motherly protective instincts maybe, i bred a litter of ferrets, 7 in the litter 6 jills one hob let the kids play with them nearly everyday jills were brilliant could throw them about all day long, but the hob was one evil little b*st**d, couldnt handle it, went feeding them one day the hob jumped on top of the sleeping box stood on its hind legs and flew at my face, luckily i moved just in time but it caught my lip and if i didnt move it would of well been latched on to it, no use to nobody, was just wild fullstop. hopefully she'll calm down for ya when litters older/sold