When you step through the doors to this wing you notice that the entire wing is actually a massive open air courtyard, several times bigger than the lobby you were just in. There's a big open field, a miniature forest, and even an artificial lake. You can see dozens of people scattered around the courtyard, on second glance though you realize that most of these people are actually part animal in some way. You see people with animal ears and tails, several full anthros, taurs of all kinds, and you think you even spot a mermaid swimming in the lake.
Eventually your eyes face forwards and you see a large kiosk attached to a concrete building a few meters in front of the door, as you approach it you take a good look at the lady behind the counter. She's an orange furred anthropomorphic fox, with three tails waving behind her, she is wearing an open lab coat, which does nothing to hide her three rows of average sized breasts, or her ten inch long canine cock that comes into view as you get closer. Looking up you see she has a name tag pinned to her coat that reads "Tammy". When your eyes finally make their way up to Tammy's face you find her giving you a playful grin.
"Like what you see?" She asks, causing you to blush as you realize you were just checking her out. Before you can apologise though, she interrupts you.
"Don't worry, I was just teasing you. Judging from the way you look around though I take it this is your first time here?" You nod.
"Alright then, let me give you a quick primer on how this place works then. You see originally the clinic used live animals and gave people their parts the same way they did with humans. But they eventually realized that leaving animals without legs or fur, or whatever they would take, was pretty cruel. So the clinic scientists worked out a way to extract the "essence" of animals from DNA samples and refine them into a liquid that, when ingested, can change someone in a way predefined when the liquid is processed. We provide the liquid in pill form, and have many popular forms prepared in advance for convenience, though we can also custom make a batch if you want something specific. We also have small amounts of the other clinic specialty on hand so if you want to do a bit of transferring, merging, or whatever, feel free to ask for some."
With Tammy's speech done you begin to ponder your options. Your three cocks, having been woken up from the arousal Tammy provoked in you, also chime in with their ideas as well. Eventually you come to a consensus and decide that…