While Tony was still unconscious, the surgeons started on their next task. Tony's second and third molars on the top and bottom were pulled. (The back two sets of teeth)
In his mouth, they placed a very special bit gag. The bar fit perfectly through the opening where his teeth had been removed. The central part had a ball through it to fill the mouth and make it impossible to pull the gag out sideways. Finally, the surgeons placed a perminant glue or cement onto Tony's remaining teeth and shut his jaw tight with the gag firmly in place, filling his mouth. He'd never open his mouth again and the gag would never be removed.
The gag didn't have to be removed in order to feed Tony. There was an opening in the side of the bit gag where food could be pumped in. It would poor out through the ball gag inside, right onto his tongue, forcing him to taste everything. Didn't matter that the slave food that Max had gotten for his slave tasted, smelled, felt and looked exactly like cum. It was going to be the only thing his pony would eat from now on.
As the surgeons worked, Tony's new feeder was being installed in his stall. The cum-like food was more than just nutritious. It was incredible healthy. And it was stuffed with the most powerful and addictive aphrodisiacs money could buy. Without being able to even get erect, Tony would become desperate to get used for sex. He'd be the most slutty sex starved pony boy in the world. Yet still in desperate denial about being gay, thanks to the chronivac. No matter how good it felt for him, Tony would always feel ashamed and humiliated. Begging for it while also trying to get away.
The final ingredient in the cum food were some special hormones that would prevent Tony from getting any older, bigger or stronger. It would keep him hairless and cute and easy to control.