You're not about to enter public in the nude, and there's no guarantee your friend will recognize the new you. And what if they do? You'd never live it down. After giving it further thought, you lean ever more toward the prospect of an employee being the best choice. They most likely know how the store works, and besides, they could either fix your problem themselves or spare one of the quarters already in the machine. They have to get that money out at some point, right?
You carefully walk through the store, attempting to avoid drawing too much attention from other shoppers while still looking for an employee. This activity takes uncomfortably long, and as you begin to wonder what, exactly, constitutes an employee's uniform within the store. As you approach the storefront in order to ask whoever was behind the register, a voice from behind caused you to halt.
"Have you found what you're looking for?" You turn around to face this person, forgetting your udder's prominent position and resulting in you bumping the shelves next to you. Taking a step back and completing your rotation, you're greeted by a rather young man wearing shades of green.
Hopeful, you confirm his position. "Are you an employee here?"
"Of course! It is my job to smooth out any issues customers have with their purchases, and it appears you may be dissatisfied."
"Yes! I made a wish and-"
He interrupts you. "You used the Wish Machine? Interesting."
Slightly displeased with his disruption, you wait in silence for him to continue. "...And it made my clothes and money disappear. I'm just looking for some quarters to fix this mess. Since you're an employee, can you-"
"I see. Yes, I can get you some more quarters, but on one condition: you must sample another of the store's goods prior to making your wish. Do not worry, it will be free of cost, I merely wish to see the result."
The store closes soon and you don't want to be running around as a naked half-cow no one recognizes. You don't trust this guy, but what's the worst he can do? "I would rather not, but if I must..."
He visibly brightens. "That's the spirit! Don't worry, you can always undo its effects. Now, if you would follow me."
You follow the employee through winding passages, some of which you're certain could not have possibly been there before. It was almost like space itself had stopped making sense. However, the employee walked with certainty in his stride, to which you struggled to half-waddle your way after him. Eventually, you lift your pendulous udder as though carrying a box, giving your legs ample space to walk.
He leads you to an aisle containing display refrigerators, inside each appeared various cartons of drink. He stops at one row, then pulls out an unmarked bottle of milk. "If you would be so kind as to drink this."
You look at the milk, then to your breasts. "You have to be kidding me."
He guiltily smirks. "You're right to think that, however, the effects of this milk is extremely similar to your current condition. It is designed to have no effect on those already affected by its spell, but I'd like to know if the item is protected against...alternative methods of achieving such a form."
"So, it should do nothing to me?" You take the bottle from him so it's not so close to your face.
"Yes, and if something does happen, I'll need to inform the owner so it can be fixed."
You lift the bottle to look at its contents. "I will, on one condition: if it goes wrong, you fix me."
"Of course! If you are unable to make a wish afterward, I will absolutely return your ability to do as such."
Then that's that, you guess. You open the container, taking a small sip. The milk is fantastically delicious, which surprises you. You quickly down what remains, then wait for a result. The employee is smiling, but it quickly fades into a frown. You begin to feel a tingling sensation through your body.
Your breasts begin to grow heavier, though their size does not seem to increase. Your hoof-hands seem to lose some more dexterity, and you can now easily see your snout as it pushes further out. Your body gains additional girth, but all of this pales in comparison to what happens with your udder. The pink bag of flesh explodes with growth, rapidly expanding from a basketball-sized mass to something that could easily contain an exercise ball. It pulls you downward as it finishes its growth, now taking all space between your legs and the floor.
The employee appears apologetic. "I see, he will be interested in hearing of this result. Now..." He moves closer to you, then places his hand over your eyes, albeit only for a split second. You recoil in response, but by the time you've done so, you realize you're now standing in front of the Wish Machine.
You're dumbfounded. "How...?" Why wouldn't he have done this to bring you to the previous aisle?
The employee hands you three quarters. "As an additional boon, I would like to inform you of the true nature of this machine. It is so cheap because it always twists wishes. Once it has changed something, it will twist even the best wish into something undesirable, if such twisting would prevent the negation of previous wishes. I apologize for only three quarters, but the store closes soon, and I will need to have you leave."
You look to the Wish Machine, carefully deciding what your next wishes will be.