Females can get as big as male Guinea pigs which can be up to 2-5 pounds
They do. Pigs are very adaptable. Feral pigs are a big problem in some areas.
Because domestic pigs are usually slaughtered, simple as that
Pigs can vary in size depending on the breed. Typically, domestic pigs can range from 200 to 700 pounds. Some breeds, such as the Hampshire or Yorkshire, can grow even larger, up to 1000 pounds or more.
People kill domestic pigs for food.
Pigs get big because they are pigs so they eat alot ;)
Altricial
Domestic pigs are descendants of wild boars, which are a type of wild hog. Through domestication and selective breeding, pigs have been adapted for human agriculture purposes. Wild hogs found in states like Texas are often hybrids of domestic pigs released into the wild and wild boars.
Domestic pigs have both hair and tusks...the tusks are removed very close to birth for the safety of humans and other pigs. The hair is generally sparse compared to wild pigs but there are some domestic breeds that are hairier than others.
Domestic pigs are related to the wild hogs that occur in some states because when pigs were first brought to America, some escaped. Those that escaped became wild and continued to breed to produce more of these wild hogs.
Its not from pigs.
The scientific name of a "teacup pig" is "sus scrofa domesticus", the same as for larger domestic pigs. This is sometimes considered a subspecies of sus scrofa, which is the species name that includes wild boars and domestic pigs.
Behavior of Domestic Pigs In a Semi-Natural Pig-Park - 1989 was released on: USA: 1989