Nails of German Shepherd Dog
Nails of German Shepherd Dog

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The tough, flat structures on the dorsal surface of digits.  Made from a hard protein, keratin.
Nails is frequently used to refer to claws of dogs. They are usually relatively blunt and non-protractile, and therefore usually register in tracks.
Also known as claws and toenails.
Cf. claws, talons, hoofs (hooves)