An Omnivore, meaning 'all-eater' (Latin omni, vorare: "all, everything", "to devour"), is a polyphage ("many foods") species that is a consumer of a variety of material as significant food sources in their natural diet. These foods may include plants, animals, algae and fungi.
Omnivores often are opportunistic, general feeders with neither carnivore nor herbivore specializations for acquiring or processing food, and are capable of consuming and do consume both animal protein and vegetation. Many omnivores depend on a suitable mix of animal and plant food for long-term good health and reproduction.
Define Omnivore, omnivory and similar derivations are terms of convenience; their significance varies according to context and to both kind and degree. Non-fuzzy definition therefore is neither possible nor necessary. Traditionally the definition for omnivory is some variation of the form: "including both animal and vegetable tissue in the diet", which seems clear enough for most purposes. However, it is neither absolute nor yet precise, either exclusively or inclusively. It is in fact meaningful only in limited senses, either taxonomically or ecologically. Because most herbivores and omnivores eat only a small range of types of plant food one seldom has reason to refer to an omnivorous pig scavenging for fruit and carrion, and digging for roots and small animals, as being in the same category as an omnivorous chameleon that eats leaves as well as insects; apart from their taxonomic differences the two have little ecological or dietary overlap.
The domestic pig (Sus scrofa domesticus or Sus domesticus: also swine or hog) is a large, domesticated, even-toed ungulate that traces its ancestry to the wild boar; it is considered a subspecies of the wild boar or a distinct species in its own right. Their head plus body length ranges from 0.9 to 1.8 m (35 to 71 in) and adults can weigh between 50 to 350 kg (110 to 770 lb). Compared to other artiodactyls, their head is relatively long, pointed, and free of warts. Even-toed ungulates are generally herbivorous, although the domestic pig is an omnivore, like its wild ancestor.
Domestic pigs are farmed primarily for the consumption of their flesh, called pork. The animal's bones, hide, and bristles have been fashioned into items such as brushes. Domestic pigs, especially the pot-bellied pig, are also kept as pets.