The ride back from the facility started uneventfully. The weights bounced Tony's balls at every bump. Rather than hurting, it actually started making him horny. Unfortunately the hospital had strapped his arms to his sides as a proper pony should be. He could do nothing about his increasing horniness.
After a while Tony closed his eyes and started thrusting in the back seat. Dad quickly put a stop it by threatening to make him walk the rest of the way. "No damn animal is going to shoot his jizz all over my car. Even if that animal is my son." Message received. Tony sat back like a good pony the rest of the ride.
Upon getting home, the arm straps were removed. Tony quickly discovered that human toilets were difficult to impossible to use with his new tail and cock. He was banished to the back yard compost pile to do his business. His tail cooperated by raising up as he took his first crap as a pony boy. He found he didn't even have to squat.
After finishing up, Tony lay down on some soft grass and finally started tending to his needy horse cock. It took both hands. It felt amazing. When he came it was an eruption, he coated himself nicely with his own cum. Tony liked the smell, but dad made Max hose him off before he was allowed back in the house. Max striped Tony's ass lightly a couple of time out of annoyance.
Strangely, it didn't bother Tony in the least.
Back in the privacy of his room Tony reviewed the chronivac settings. Tony had taken certain things in stride that until 48 hours ago he never would have. After searching and verifying the chronivac was not directly involved with his attitude adjustment, Tony got on the internet. He quickly found that the standard pony treatments all eroded inhibitions and increased submissiveness. Everything including his food was involved. The treatments themselves were changing his mind, making him at ease living naked, in public, as a subserviant animal.
Tony sat back in his chair as his tail idly flicked. This part he hadn't taken into account. He should have assumed there was mental conditioning involved somehow. Tony thought and evaluated his feelings.
Tony had to admit he was enjoying himself. Conditioning or no, he was happy and liked his changes thus far. The fact that he wasn't feeling humiliated being treated as an animal was actually a good thing. He was adapting quicker than he thought. In the end Tony decided to make himself immune to any more erosion of his willpower, but decided to remove the last of his inhibitions. He gave the following command to the chronivac: "As of now I am immune to any further willpower erosion by pony food, procedures or treatments. As of now I remove all inhibitions that make it uncomfortable for me being a pony." Little did Tony realize that last part sealed his fate as being a pony boy. He would never want to give it up.