You begin to feel strange as you hear the sounds of hooves come closer and you see a 6.5ft horse who had brown fur and was standing on its own 2 legs. “Ah yes ,a beautiful mare you will become.”he said grinning at you ,he than proceeds to take of his clothes and you see his massive cock that makes your fearful ,but curious what he will do to you . “Let’s get started show we?” He neighed in a seductive tone , he proceeds to put his dick in your mouth and you begin to gag on how big it was as you try to move but the metal shackles didn’t come off. As you forcefully sucked his dick , you see your cock has gotten smaller and is half the size it used to be and you see your fingers are beginning to look a lot darker. Then he neighs a final time then he shoots a load into your mouth forcing you to swallow all of it as you gagged, you looked down again and looked in shock , your dick was nowhere to be seen but instead, a vagina is all that’s left and above it is your black horse tits that are size F and you moan as he squeezes them. Your look and see that your growing white fur and your hands turned into 3 digit hooves. The shackles finally release and you get picked up immediately “I’m not down just yet “ the horse said while grinning, you begin to yelp in pain and moan as he shoves his member in your vagina , you feel your face as it begins to turn into a horse muzzle while your hair grows longer and turns blonde while the white fur on your body finishes as your feet turn into hooves. As he keeps penetrating you , you begin to neigh and as in one final thrust you cried and neighed one final time as you look at him and you pass out seeing him smile and beginning to pick you.