Plutarch's Natural Questions (28-31)

Is it because his teeth stand so far within his head, that he cannot well come at the thread? For his lips, by reason of their thickness and largeness, meet close before. Or does he rather rely on his paws and mouth, and with those rend the toil, and with this defend himself against the hunters? His chief refuge is rolling and wallowing; therefore, rather than stand gnawing the toil, he rolls often about, and so clears himself, having no occasion for his teeth.

Is it because very fat goats (τράγοι) are less able to procreate, nay, scarce able to use coition, by reason of their fatness Seed is the superfluity of the aliment which is allotted to the body: now, when either an animal or a plant is of a very strong constitution and grows fat, it is a sign that all the nourishment is spent within, and that there is little and base excrement, or none at all.

Is it as baldness happens to great wine-bibbers, the heat of the wine evaporating the moisture? Or, as Empedocles saith, the putrefied water in the wood becomes wine beneath the bark,... thus, when the vine is outwardly irrigated with wine, it is as fire to the vine, and destroys the nutritive faculty. Or, because wine is obstructive, it gets into the roots, stops the passages, and so hinders any moisture from coming to the plant to make it grow and thrive. Or, it may seem contrary to Nature that that should return into the vine which came out of it; for whatsover moisture comes from plants can neither nourish nor be again a part of the plant.