Uses custom textures, so

    You'll need Entity Texture Feature if your on Fabric/Forge.
    Also CIT or chime to display custom Name Tag before 1.21.5
    Might work with Optifine.


They have a tiny chance to appear in any biomes.
Chances are higher in all moutains relative biomes (except savanna windswept).
They have a huge chance to appear in meadows.

Anywhere you can get them by renaming them :

    Milka
    Swiss_Chocolate
    Vache_Mauve