1. Animals with pointed teeth drink by lapping, and some that have not pointed teeth, as mice. Those which have an even surface to their teeth draw in the water as horses and oxen; the bear neither draws in the water nor laps it, but gulps it down. Some birds draw in the water, but those which have long necks imbibe it at intervals, lifting up their heads; the porphyrion alone gulps it down. All horned animals, both domestic and wild, and those that have not pointed teeth eat fruits and grass, and are incapable of enduring hunger, except the dog, and this animal eats fruit and grass less than any other.
2. The hog eats roots more than other animals, because its snout is well adapted for this operation, it is more adapted to various kinds of food than other animals. In proportion to its size its fat is developed very fast, for it becomes fat in sixty days. Those who occupy themselves in fatting hogs know how fast they fatten by weighing them when lean; they will become fat after starvation for three days. Almost all other animals become fat, after previous starvation. After three days those who fatten hogs feed them well.
3. The Thracians fatten them by giving them drink on the first day, then at first they omit one day, afterwards two, three, or four, till they reach to seven days. These creatures are fattened with barley, millet, figs, acorns, wild pears, and cucumbers. Both this and other animals with a warm stomach are fattened in idleness, and the sow also by wallowing in the mire. They prefer different kinds of food at different ages. The hog and the wolf fight together, a sixth part of its weight when alive, consists of bristles, blood, and fat. Sows and all other animals grow lean while suckling their young. This then, is the nature of these animals.