Pigs can easily reach the age of 20 years or more, but the longevity of animals is often artificially reduced by humans for breeding purposes. Practically, there is no mathematical formula (well at least, not a simple one) because the age of a pig does not follow a linear curve compared with the human age.
So it's rather from observations of the ages of pigs that veterinarians have established a correlation table (age chart) to see an equivalence in human age:
|Pig real age||1||2||3||4||5||6||7||8||9||10||11||12||13||14||15||16||17||18||19||20|
Life expectancy of the pig: a horse can live for about 20 to 25 years.
Animal abuse is unbearable, and it is important to give rights to animals. For more than three decades, the Animal Legal Defense Fund (ALDF) has been fighting to protect the lives and advance the interests of animals through the legal system, pushing government agencies to do their jobs to protect animals and shining a national spotlight on issues like factory farming and dissection in schools.