You turn and notice the door to a back room cracked open just a bit, with a dim, yellowish light flowing out of it. What gets your attention, though, is the smell.
It's wonderful.
You take a deep draw in of breath, and while you can't place the scent you want it. You cautiously walk up to the door and knock. "Hello?" you call out. "Is anyone back there?"
Your knock causes the door to swing open, revealing a small break room. It's much like the rest of the shop, cramped, dingy and cluttered. It's lit by a single bare lightbulb hanging from the ceiling. There's a beaten up table with a couple chairs along one wall and what looks like merchendise on shelves and on the floor.
On the floor, your eyes and nose focus on the same thing, a large plastic dog bowl with a pile of dog food in the center. It only takes the tiniest whiff for you to simply know that this is what you're smelling.
You take a couple of tentative steps into the room, and you feel your stomach growl. It's as if you haven't eaten in weeks. You feel like your vision is tunneling out as your view narrows to just that bowl and the food in it. You fall to your knees at the bowl, trying to resist the unfamiliar instinct that suddenly seizes you, but it's a lost cause. You plunge your mouth into the bowl and start to chow down on the food, tasting the wonderful taste and feeling it fill your belly. When you're done, you finish by using your tongue to lick the bowl clean, then you fall back on your haunches panting.
It's only at that moment that you realize that, while you were eating, you transformed the rest of the way into a dog! You're also no longer in the magic shop, but in a kitchen of a house somewhere! You look at the yellow plastic food bowl and read the name you now have...