"Yeah, Kenny, was it as good for you as it was for me?" Tom asked.
Ken just panted like the bitch slut he was becoming.
"Aw, it's so tiny now, it looks like a wart. Soon it will be your new labia," Tom said, "Oops, better get a photo for the chart." He suddenly sounded professional again. He snapped a picture of Ken's crotch. Then he set up a video camera to capture the final moments when his brother would cease to be male and forever become his bitch.
"You see, Ken, making this as simple as your simple brain can understand. Your X- Chromosome has been duplicated, and your Y-Chromosome is being deleted by the special nano-viruses I injected into you. They are also replacing your humanity with caninity. You're becoming a dog, my dog, my bitch dog. The dog I couldn't have because of you. The folks said you were allergic, but no worries, you won't be allergic to dogs anymore."
Ken stopped panting, and gasped, "It wasn't my fault that I was allergic! What did I do to you to deserve this? Why are they letting you do this?"
"Well, Kenny, it's not like you'll be telling anybody anything anyway. So let me tell you about the professor's plan for a new world order. First off, the planet cannot sustain a population of 10 billion humans very long."
"There's space? And new horticulture? You're going to turn people into dogs to reduce the world's population? No one will volunteer for that."
"You volunteered!"
:"Not for this!"
"Space is not a practical option. The population density would be too high on Earth before Mars could be properly terraformed. And no not everybody will be a dog. It's just after humans and fruit flies, we know the most about canine DNA. So this will be the gateway technology to see how effective the synthetic viruses are at changing people. The American Bison population can be restored. Even the Wooly Mammoth may be resurrected. There are actually two studies going on here. The one that you are in, and is to make sure that the viruses will change humans into other species which are still capable of breeding and producing new young of their new species. We don't want any of the nightmare offspring produced by Brian and Stewie in Family Guy. Oh, wait you probably didn't see that episode. I have a screen capture on my phone."
Tommy shows Ken a photo of the TV show with Brian and Stewie surrounded by half-human half-dog clones.
Kenny whimpers, and then snarls. He cannot form words anymore.
"Oh, good, Kenny - I've got to come up with a new name for you eventually," he shrugs, "Barbie?"
Ken growls.
"Haha, maybe not. Anyway, it's time for more shots. You're going make me one fine bitch. Now if the virus works properly, you should be able to get pregnant from human sperm, but your offspring should all be dogs. I'll be back in a couple hours to breed with you," Tommy says as he injects Ken's labia, belly, neck and thigh with different syringes. The fur rapidly is covering Ken's no longer human, no longer male body, as he passes out. He dreams of playing fetch with Tommy when Tommy was a kid. He's Tommy's dog now.