The most common body types are Pixie, Polo, and Plucky. Pouflons can easily exist as a mix between these body types, and each type is just as common as the others- though you may find more of a particular body type in different regions.
Pixie pouflons are small and petite, but are also adept with aerial endeavors. Polo pouflons are best suited for sprinting and running, and are generally quite graceful. Plucky pouflons are built for endurance and strength and often (and easily) do a lot of heavy lifting.
Baby pouflons also reflect these body types, and display the same differences in proportion.
All pouflons have the ability to withdraw their wings using magic. When this happens, a little puff of magic dust appears from their fur, and they're left with four tufts of fur on their back instead of wings. (A pouflon could, conceivably, keep only one pair with wings out, with the second pair withdrawn into the tufts.)
Whether a pouflon keeps their wings out or in is their own preference, but they can switch between the two options at any time.
Pouflon anatomy is closest to the anatomy of lambs and goats. This drawing depicts a typical pixie pouflon.
Important points to note:
Below is an example of a pouflon skull, and a front-view of a head.