How can you tell if a Pomeranian is purebred?

A purebred Pomeranian has almond-shaped, very black eyes set not too far apart; if the eyeballs clearly protrude, or it has triangular or fox-like eyes, it is likely not purebred. Next, a purebred Pomeranian has a small triangular muzzle that is small and short, whereas a mixed Pomeranian may have a thinner, longer muzzle.

Finally, a purebred Pomeranian has very soft and fluffy coat, with coarse straight outer hair and soft dense undercoat, and its front legs are slightly higher than the hind legs with a straight short back, giving an overall ball-like appearance.