A sip and then with the wanting wonder of what it would feel like to walk the earth on all fours and having cloven hooves Mary downs the Bison vial.
Her tongue reached into the vial tugging out every single drop.
She stands there feeling her balance wobble and falls forward. Butt high in the air her hands on the floor she is having strange feelings as the poisen pulses through her veins.
Pur white hairs are falling out, replaced by short and very dark brown hairs. Her shoulders, neck and head are fast evloving into true bovine bison form as teeth fall out and lips become more atune to grazing.
A shorter tail now swishes her rounded and black skinned butt. Her pink udder now leathery tough and black of hide like those on a bison.
Her feelings are getting like her form, more basic in desire and use.
A human mind is as the vials would have for Circe or some other witch, they degrade the human brain into one of pure beastly form.
The thought of this being a foolish act hits as she watches her arms and hands form into forelegs and cloven hooves of a mature bison cow.