as soon as you utter the words you start to feel itch around under your pants as you realize you should have striped first. you sit down on a nearby stump as you take off your shoes and socks, your feet already changing. Heels shift up your legs as your toes fuse together to become hooves. White silky strings growing around your former ankles as brown fur growing in and travels up the legs. Removing the pants and underwear you see that your legs coated in thin brown fur as musules bucked up around your legs, like your caffs and behind, speaking of which you feel your tailbone growing.
New nerves and vertebrae grow in as you a nub forms, than it grows out to a hairless 5th limb before long golden brown hairs grow out to become your new horse tail. You play with it in your hands as you take note of the few changes happening on upper body. You feel your ears growing pointed as they elongated to become horse like ears. body fat melts away as muscles become more pronoused as your 8 pack grows in and shoulders broaden as your arms take on more musule mass making you look like a buff horse like satyrs in a shirt way too small for you.
"well this has been an interesting change so far but aren't i sapport to be...more horse like?" you ask yourself as you see two things poking out of your shirt. pulling your shirt off to see that they were two little hooves growing out into two new forelegs. you move yourself from the stump and to laying on your side as you feel your spine tingle again as your body grow longer, your backside and legs moving to the back, while your new forelegs grow strong enough to support the body weight of a young work mare.
you stand back up, now at about 8 feet, half of which is your new horse half you take off your bra the last of your human clothing as you feel the wind blow thought your hair.