Mistress Gaia had been hurt by her ex girlfriend but she did not do or say anything bad. She just broke up with her and went her way. The girlfriend realized what she had lost and came back to try and patch things with her. That angered mistress Gaia because of how selfish it was. No apology but wanted to have her back. So she punished her by making her a human pony.
Mistress Anfisa wanted a horse but since she could not buy one where she lived, she had to make do with a human one. That is why she settled for pony training him and she did it well so that he became a great human pony for her. She wanted him to learn about endurance so that he would be able to carry her all over the house for hours.
Mistress Gaia was angered by how foolish this guy was and she did not want to let him continue making the same mistake every now and then. So she used her pony play training to dominate him. She forced him to be her human pony and he had to endure the pain as well as the humiliation that it brought him. He tried to plead his case but she ignored him.
Lady Scarlet was not ok having a new slave who did not know how to be a human pony. That is why the mistress chose to use her pony play training to dominate him. She even asked her friends to go and have a go at him and they all had fun at his expense. The slave learned the hard and painful way and became their best ever human pony.
Mistress Claudia did not want anyone working for her to be misinformed. When she realized that this guy was misinformed, she knew that the best thing she could do to him was to trample and humiliated him. She also turned him into a human pony and rode his back until it was backbreaking. Then the mistress let him go knowing that he would do his best not to be misinformed.
Goddess Alice had had enough of her boss and she knew that if she did not do anything about it, nothing would change. So the mistress trampled him cruelly by turning him into a human pony and punishing him like never before. He was shocked that she had the audacity to do that but he changed and he stopped what he had been doing. All her colleagues benefited from her audacity.
When it comes to dominating people and especially slaves, mistress Cheyenne is one of the best in the business. She undressed as the slave watched and in so doing, managed to tease and deny him. As he was still turned on, she turned him into a human pony and she rode his back until it nearly broke. He cried and thought she would have mercy on him but she did not.
To make it all look and sound real, mistress Alice took this human pony to the woods where she pony trained him. She knew he had never been there and that what she was doing to him was cruel but that is how she wanted it to be. He had to learn never to piss her off and he had to know that she was to be obeyed at all times.
Lady Scarlet and her colleague were sacked by their boss and they felt that it was unfair since they were being used as sacrificial lambs for a mistake which was not theirs. So they chose to teach their boss a lesson before they left. They made him a human pony and they tortured him for fun now that he was no longer their boss and they could do with him as they pleased.
These mistresses wanted a fast and agile human pony. But what they had was at best sluggish and they did not want to keep tolerating it. They had to make sure it was trained to be better and to be agile. So they whipped it painfully before they rode its back all over the house to make sure it learned to follow their instructions and to toughen up as well as be agile.