ἐξ ὀνύχων λέοντα τεκμαίρεσθαι → judge by the claws, judge by a slight but characteristic mark, small traits give the clue to the character of a person, deduce something from a small indication, identify a lion from its claws
[Seite 451] βοῶν θεραπεία, die Ochsen hütend, Plat. Euthyphr. 13 b.
ῆς (ἡ) :s.e. τέχνη;l’art de soigner les bœufs, l’art du bouvier.Étymologie: βοηλάτης.