The firery glow of the Medallion told of it's power. As John gripped the stallions reins he was feeling as if the power was surging through him.
"OH my .........!" John started to say as a darkened skin color began to cover his hand holding the reins. A matching roan colored hair was sprouting on wrist and moving up his arm.
John stared in silence as his fingers which were interlaced with the reins of Jared's bridle began to blacken and in seconds formed a solid hoof.
As shirt buttons popped off a young teen's chest expanded. Lungs and internal organs grew at a highly increased rate. Ribs expanding to bare the load gave no pain. Shirt sleeve tore as muscle and bone grew to new size. The change was working rapidly as John felt his face swell.
Now he was so captivated by watching the changes he made not a sound. Jared nikkered at his growing friend and with a yank he pulled the buckle off John's belt. A sigh of relief came from John as he tried to smile the thickened lips.
Rolling to lay on his side John watched in fear and pleasures the changes and growth of his maleness. Thighs broadened as muscles flared with growth and equine power. The deep feelings of strength and a stiffness made John stretch this way and that.
In each stretching the tendons and muscles slipped into perfect unison. In less than an hour John Killingsworth changed from teenager to a duplicate of his friend and new stallion. As shreds of clothing fell to lay on the cold ground a new vibrant animal walked in small circles looking and feeling his new form.
As stallion looked face to face with it's twin, both Jared and John's mind touched the other. John now knew of Jared's change and how it came to make him a pony. Then too he understood that Jenny had found the pony show and touching the medallion had lost her humanity. Then as stories passed on to John the stallion before him shuddered with a shiver of absolute thrill.
John looked as he obsevred what was common yet now he understood the mindset of his stallion all the better. Jared began to become erect in a short minute was fully engulfed in a round of personal satisfaction. As Jared's semen splattered the ground the scent touched both John's nostrils and equine mind. Suddenly the odd and new feeling of his giant penis fell from the sheath. Growing and swelling the organ was soon erect and stiff.
As hard as he was the organ took control of both human and beastly minds. The massive thing beat up and bonked the round hairy belly above it's station in life. It released the strained pulling up and swung down with the heavy weighted force linked to gravity. A huffing of his lungs as each thrusted lifting of the organ made his balls churn for release.
A whinnied scream from John and his first masterbation of thousands to come exploded spewing cum ans chucky globs of semen over forelegs, belly, and the hoofs which stood him on the ground.
Like two colts the stallions began to play the instinctive trotting and nudging which ponies do when enjoying fun. Jared led John away from the pond, a medallion, and the shreds of tattered and torn clothing which once were his. First to learn the trot, then to manage the abilty to run on all fours, John learned quickly and well.
Jared had long since accepted his new life and body, as now he could bring the satisfaction to his friend John. Knowing that masterbation was only an exersize for a stallion, he searched the winds for the sensual scents of mares. Mares who with their wild and sexual desires would coax the human John to accept and forget his taught human ways.
Together they galloped across the open pastures, jumping fences, they searched for companionship.