You consider the old man's words but you start the realize the reality of the situation, hardly believing you have become a castrated mule!! "You think I'd willingly become your pack animal for a chance at fucking some horses? Surely I can find someone who can cure me of this wretched form you damned, warlock!" you shout at the grizzled old man. You start bucking in an attempt to shake the wizards belongings from your back. "Go rot in hell you damned warlock!! Once I've found help, I'll find you and I'll-- Hee HAWWW HEEhawww". Your attempt to threaten the old man is cut off abruptly by your loss of voice.
The bear of a man laughs at your failed attempt to shake off his packs and calmly says "Hah! What makes you think anyone would bother to help a dumbass donkey like yourself if you can't speak." The grizzled warlock steps closer to you exclaiming "I'll tell you what Jack, I'm willing to give you another offer. Carry me and my belonging across this mountain range and I'll feed you and protect you from the predators in these forests. Perhaps if you behave yourself I'll consider rewarding you afterwards."
You stare dumbfounded at the bearded man as he picks up your halter and holds out a bag of oats. You realize how hungry you are after carrying him all day and worry at what little power you have in this situation. "HEEEHaw.." you bray in defeat. Your large donkey ears lay flat against your neck as you reluctantly start eating the oats. The old man lets out a loud guffaws as he starts rubbing your neck. "Jackasses like yourself are only stubborn until they realize who takes care of them".
You hardly notice the warlock tieing your halter to a tree as you fill your stomach with oats. When you get your fill you look up to see the old man setting up a tent and campfire. You try to walk over to him but your halter stops you from moving far from the tree. You spend a long time watching the old man cook and eat his dinner while drinking heavily from a dark jug. You wish he would have removed more of these packs from your back. After night falls, your ears perk up as he walks towards you but lower again when he doesn't acknowledge you. He shuffles up to the tree clearly drunk and lowers his pants to take a long piss at the base of the tree your tied to. He shakes his cock before pulling his pants back on and you bray in disgust as some of his piss lands on you. Noticing the bray, he greets you with a simple "hello Jack" as he starts rummaging through the packs on your back. He grabs something and slaps your ass before he heads to his tent. You wonder why he hardly paid attention to you, and bray loudly when you realize he was treating you like a dumb pack animal.
You wonder what kind of 'rewards' he had in mind if you behaved during your trip through the mountains. You have no balls, no voice, and no way to take care of yourself. You're just a fat, gray mule at the mercy of an old, hairy warlock. Maybe if you pretend to be his animal and do whatever he says for the next month he'd trust you enough to talk again. As you fall asleep you fantasize about finding help in the first town... You dream of large pastures and other equines.