As you desperately try to pull your palpilating cock from the dog. An irriatating ictching comes over you, as though individual pins are piercing your flesh. Strands of brown hair push out of your skin. Your short cropped hair grows from the neck and downwards. Your pubic hair also grows to meet this new hair. The fur becomes of similar markings to your dog's. Gasping you try to pull away, but your transformation is starting to make you horny again. Your dog wags her tail as she feels your hotness. You cry out as your hands prickle as though you've been sitting in an odd position and you've developed pins and needles. The fingers shrink back into the skin, you can practically feel the bones decreasing. Your thumb disappears back into the flesh and the nails on each finger grow black and stubby. The hair then covers them. You watch in terror as the same thing happens with your feet. The large toe disappears in the flesh and the other toes grow stubby nails. Hair then covers them. You hiss through your teeth as something seems to erupt from your buttocks. A tail winds it's way through and soon sprouts hair. Your spine crunches in a disgusting way as it rearranges it's self. You cannot stand up on two legs and land upon the dog's back, in the proper position. It's as though something has taken over your mind as you begin to pant excitedly, a long tongue grows in your mouth, along with sharp canines. You start to thrust and shove again. As you do so a pain in your head hits you. Your nose and mouth expands into a slavouring muzzle and your head sinks back. Your ears become pointy and end up on the top of your head. As you try to say "help me" it becomes a growl as the transformation finishes. You still feel the same, but you have a continous desire to thrust your seed in this bitch.