When Ken next woke up he didn't have a cock.
It was the first thing that he noticed, the empty feeling between his legs. No more rock hard, throbbing pillar of flesh.
He felt like he had been robbed, wronged by the mad scientists and especially by his sick fuck of a brother. He couldn't believe that Tom had taken his ass like that with his huge, masculine cock. Thrusting in and out of his tight pucker like a piston. That huge nerdcock filling him, breeding him, using him like a blowup doll. Images of huge male phallus thrusting in and out of his puckered anal lips, and his new found pussy lips, flashed into his mind.
His new cunt ached, dripping wet. He needed cock.
Fur now covered a majority of Ken's body, and he was significantly smaller. He felt lighter and sleeker, and slightly dumber. Smells and sounds were sharper and more crisp. The white light was still blindingly bright, and he twisted helplessly in his restraints against the hospital bed. In the night, someone had come in and adjusted the straps for his new smaller wrists and ankles. His much thiner paw-like hands had been trimmed and groomed, and a muzzle had been affixed to his mouth which held his mouth open in a permanent O.
The door opened minutes after he regained consciousness, and Ken looked to see two doctors he didn't know enter the room. A pretty blonde attendant with a clipboard and a huge purple dildo, and a handsome young man with a large metallic case and an obvious tent in his pants.
The young lady approached Ken, while the male doctor shut the door and locked it. He walked over and set the metallic case on a low counter in the corner of the room Ken had never noticed before. He paused to rub at his obscene bulge through his dress slacks, before opening the case. Inside the transforming bitch could just barely make out a bunch of cylindrical mechanical devices and a series of plastic tubes connecting them. But his attention was drawn away by the female doctor who placed the large pure dildo across his prone form.
The sex toy was huge by normal standards, and in his much more diminutive form the purple dildo was massive to Ken - nearly half his body length. It was heavy too, and rolled on his flesh to lay flat against his stomach. He swore the plumb-size balls throbbed when they touched his furry flank.
The female doctor smiled at him, and ran a hand down his nuzzle affectionately. With her other hand she deftly pulled down her skirt, leaving her lower half completely naked. Her silky smooth shaved pussy glinted at Ken.
"Good afternoon, Subject 23. My name is Doctor Nona and today I will be preparing your body for the process of being mounted by a stud dog. We want you to be capable of handling phallus of all different breeds and varieties, from human male to bull cock. The drug my compatriot Doctor Sean will be administering to you momentarily is designed to dilate your vaginal cavity to far beyond the limits of what is normally possible in female dogs your size and breed." The doctor's speech became fragmented and high pitched at this point, as she had begun to dig her well manicured left hand into her glistening cunt, thrusting in front of Ken's muzzle, only inches away from his bed. Her right hand shook slightly as she read off the clipboard clasped in her red fingernails.
"We, uuaahn, will be testing the possible dilation of both your anal and vaginal walls, as well as the capacity of your oral skill. I will be administering the anal and vaginal test and, ooohhh, Sean will be administering the oral. Doctor Sean, when you are ready."
The male doctor turned from the case, with four syringes in his hand. He walked over to the hospital bed, laying out the syringes on the metallic tray. Three where filled with a bright pinkish liquid, and the fourth with a bright yellow. With a grin, Doctor Sean pulled down his pants. He had been going commando, and his seven in cock swung free. Reaching out, he grabbed the yellow syringe and injected the liquid into the base of his rock hard dick.
Ken panted and watched in fascination as the doctor's cock swelled from seven inches into a fourteen inch mega cock that slapped heavily from thigh to thigh.
That must have been how his fuck head brother got such a huge fuck-stick.
"Now for your turn, sweetie." Doctor Nona said, holding up a red syringe.