"Oh what the hell, I'll go with horse. If I'm gonna do this, might as well go for the biggest upgrade." You think.
When you tell the nurse your choice she smiles and directs you a room in the back. There, another nurse has you take off your pants and lie down on a table. She puts on a pair of latex gloves and starts inspecting your junk.
"Don't worry, just making sure everything's as it should be. And I'm happy to report that your cock and balls appear to be just as they should for someone your age." she said, a twinge of desire in her eyes. You can't help the erection you've got, staring this beautiful woman down. She doesn't even bat an eyelash at the wood you're sporting.
"Please, I've seen my fair share of aroused men, and animals. You'd be surprised how far some folks go." she said.
"Really? How far can you go?" you ask, a bit intrigued.
"All the way if you want. Of course if you go half and half, anthro as it's called, you have to remain on the island. Can't have a bunch of bipedal wolves and tigers running around the city streets can we?" the nurse said before exiting the room.
You lie on the table, wondering if you should go all the way. You didn't think it was possible for a complete transformation, or even a half transformation. Maybe you don't want to be human anymore. A tiny, pathetic human with a tiny human cock. Well average, but in comparison to a horse or bull's it's tiny. Or even a wolf's hard red knot.
The nurse reenters the room with a syringe and a tub of something. She looks expectantly at you, as if she knew you were reconsidering your options. You tell her...