Sextus Empiricus Pyrrhoniae Hypotyposes 1.14.72

[72] If, then, it has been shown that the animal upon which, as an example, we have based our argument not only chooses the wholesome and avoids the noxious, but also possesses an art capable of supplying what is wholesome, and is capable of comprehending and assuaging its own sufferings, and is not devoid of virtue, then—these being the things in which the perfection of internal reason consists—the dog will be thus far perfect. And that, I suppose, is why certain of the professors of philosophy have adorned themselves with the title of this animal. ¹