Riley desperately looked around the room for something to defend himself with. The wardrobe was too heavy to move, and none of its contents would help. He decides on using one of the treat bowls as a weapon. He knew his chances were next to nothing but he just wanted to trick himself into believing.
Riley quickly to the side on the door so when the man came in he wouldn't see him. The door unlocks and opens. Riley watching the man walk quickly hits the bowl against his head. However the bowl did not break or knock the man out instead angering the man. He quickly grabs Riley by the hair and throws him to the ground, "You little shit I was wondering where you were! You haven't transformed yet either guess I'll have to fix that." The man pins Riley to the ground and pulls down his pants, "we always get boys like you who try to escape, but it never works. I use this bad boy in these kind of situations." The man pulls down his pants to reveal a fully erect dog cock, "I got the transplant done a while back to make this job more fun. I'm loaded with dog cum so I'll just transform you the old fashion way."
He spits on his fingers and forces it up Rileys asshole loosening it up. Riley tries to scream for help but the man covers his mouth telling him to shut up. The man slides in his cock into Rileys asshole making Riley groan in pain. "I'll do it slow for you. I want this to last as long as it can." He said eagerly.
Riley quickly began to feel changes. His speech started to slur and his ears lost its original shape in favor for floopy ones covered in fur. He could see his arms and legs begin to bend and change shape. His feet and hands shrunk and changed to paws. "The DNA from my spit and pre-cum is rewriting yours as I'm fucking you. This causes the rate of your transformation to increase faster than your friends because it's raw and pure. I'm not even sure if you can still understand me but i also don't care because you're almost done." Fully covered in fur Riley no longer resembled the boy he was before. He could only bark and almost looked completely like a pup. "You just need the finishing touches and you'll be good to go. This should calm you down too so just take it."
The man removes his cock from Rileys new puppy hole and moves it towards his mouth. He slide his cock all the way inside making sure Riley would bite him with his sharp teeth. "You're gonna take my cum like a good pup. Just let your new dad fill you up with his love." He started thrusting making Riley choke but he didn't care. Neither of them did because it felt so good. The man then came into Rileys throat making sure he gulped down every last drop. He was right too, his cum did calm Riley down and his transformation was finally complete. "Now go join your new brothers. I gotta get you pups ready for the puppy bowl." He pulled out four cages for the pups and loaded them onto a cart wheeling them away.