There she was, the ultimate puppy. The poor thing was once an attractive young girl, but now she was completely unrecognizable and modified to be something new…

It all started when she surrendered herself to the Slave Training Center for puppy training. The young girl had always been fascinated by puppy play, and loved the idea of spending all day on the ground crawling around behind her master.

Her training started out normal, wearing a collar she spent her days crawling around, and her nights sleeping on the ground. Meals were bland and out of a dog bowl, and relieving herself was done either outside or on newspapers.

Within the first week, she was noticing differences immediately, not only were her knees getting stronger after the initial discomfort, but she was getting more eager to be used than she ever thought.

Little did she know, every meal she ate was loaded with birth control and estrogen pills. The combination was making her extremely horny and giving her a nonstop craving for cock, yet the birth control ensured she’d never get pregnant.

As part of her training, she’d often get fucked by the men and women working to condition her into this perfect puppy. The first time it happened was awkward for her. Being in such a vulnerable exposed position, and being penetrated in front of others felt embarrassing.

But soon, she grew to crave the humiliation more than anything. She was completely forbidden from touching herself in any way, so the only relief she could get was through daily use.

One of the weirdest sensations for her to get used to was the tail. She’d always enjoyed putting a cute dog tail plug in her ass, but suddenly wearing one for 23.5 hours a day was taking its toll on her.

Every morning after her breakfast, she’d be taken outside to relieve herself and the tail was removed. She figured out quickly, that would be her only window for solid waste.

At first, it was hard for her to adjust to the sensation, but now she’d grown used to her ass being plugged non-stop, as it slowly began to stretch and require larger plugs every week.

After a few months however, the changes began to increase. First, she was given a few piercings. They seemed normal at first and she didn’t resist. Both her nipples received small steel rings, and the next one was placed in her septum.

However, as time went on so did the modifications to her. She learned quickly that her transition to a puppy was going to be permanent. After a short trip to the doctor, the back of her tongue was modified, now allowing it to hang out of her mouth even further. This meant that she was often found with it sticking a good inch or so out.

Next, she was taken for markings. Large tan spots were tattooed all over her body making her resemble a dog more than ever. As she watched the permanent markings, she began to realize even more that this was her future.

Training continued for her when finally she’d passed her 6-month puppy certification, and was ready for rehoming. She wasn’t sure what would happen, but she’d hoped a loving master would adopt her and she could serve as his puppy forever.

She went to sleep that night ready for her new life, and dreaming of what was to come…