Pig
Domestic Pig Facts
| Size | 24- 35 inches (60-90 cm) (shoulder height) |
| Speed | Up to 12 mph (bis 20 km/h) |
| Weight | 265-1,100 pounds (120-500 kg) |
| Lifespan | 5 month to 5 years (farmed animals) |
| Food | Roots, tubers, beets, grains, fruit, berries |
| Predators | Wolves, bears, big cats, domestic dogs, coyotes |
| Distribution | Worldwide except for polar regions, deserts, and mountains |
| Habitat | Forests |
| Order | Ungulates |
| Family | Bovids |
| Scientific name | Sus scrofa domesticus |
| Characteristics | Intelligent, sensitive mammals with trunk-like snouts |
Main Characteristics
Pigs are hoofed animals that originate from wild boars. Unlike their relatives, they have significantly less hair. It is said that they are smarter than dogs and at least as intelligent as a 3-5 year old child. They can even pass the mirror test. Additionally, pigs are very sensitive and social creatures. The stereotype that pigs are dirty is not true. They prefer to be clean and will separate their sleeping and eating areas from their "toilet" - if we humans allow them.
Distribution and Habitat
Pigs are found all over the world, except in polar regions, dry deserts, and high mountains. They prefer a temperate climate, which means not too cold and not too warm. They enjoy forests, loose soil for rooting around, access to water, and mud to protect themselves from heat and parasites.
Way of Life
Pigs are active during the day. They love to explore their surroundings, especially using their noses. They enjoy rooting around in the ground, wallowing in the mud, playing with their peers, communicating through a variety of sounds, and taking time to rest. They form small groups consisting of females and their young. Male pigs tend to live alone or in bachelor groups.
Names
- Pig: General term
- Sow: A female pig that has given birth for the first time
- Gilt: A female pig that is no more than six months old
- Piglet: Young pigs weighing under 55-66 pounds (25-30 kg)
- Boar: A male pig over 18 months old
Anatomy and Appearance
Size and Weight
Depending on the breed, pigs have a shoulder height of 24-35 inches (60-90 cm), a body length of 3.9-6.5 feet (1.2-2 meters), and their weight is 265-1,100 pounds (120-500 kg). In the past, pigs only weighed 90-220 pounds (40-100 kg). Nowadays, they are significantly larger and heavier due to selective breeding by humans.
Flat Nose
Pigs are unmistakable due to their nose. At the tip, there is a flat, round cartilage disc with two holes. The nose is as versatile as a Swiss Army knife. It assists in breathing, smelling, digging, rooting, feeling, examining food, petting, nudging, and fighting.
Curly Tail
Pigs have a short curly tail. They use it to express their emotions. When they are happy, they wag it - just like a dog! However, when they feel scared or stressed, they tuck it tightly against their body. In livestock farming, the tails are cut shortly after birth, which is very painful since they are not anesthetized. The reason for this is that they are kept in very cramped stalls and would bite each other's tails off out of stress. By the way, their teeth are also filed down for the same reason.
Diet
Pigs are omnivores. They prefer a very varied diet. They consume roots, tubers, beets, grains, fruits, berries, insects, worms, snails, and small vertebrates. In livestock farming, pigs are primarily fed food that allows them to grow rapidly: soy, peas, corn, wheat, barley, and oats. They do not eat the provided feed because they enjoy it, but rather because they have no other option.
Behavior
Pigs Are Very Clean
Pigs are often seen as dirty animals. But is that true? No, pigs are actually quite tidy. Similar to cats, they avoid dirt in their sleeping areas and do their business away from it. They roll in the mud to care for their skin, cool off, and protect themselves from sunburn. Just like elephants, who interestingly are not considered dirty. Pigs are perceived as filthy because we humans keep them in cramped spaces where they cannot fulfill their hygiene needs.
How Pigs Communicate
• Sounds
Pigs communicate using their entire bodies. They express their feelings through a variety of sounds – such as grunting, squealing, snorting, humming, barking, screaming, and croaking.
• Body Language
Additionally, they use body language to communicate. They wag their tails joyfully, perk up their ears attentively, nudge and lovingly rub against each other with their noses, or show their teeth in annoyance to warn pushy companions.
• Scents
Scents are also very important to pigs. They rub against objects to leave their own scent – as a "message" for their fellow pigs.
Pigs Are Very Social
Pigs are very sensitive, loving, and caring animals. They form friendships, cuddle with each other, groom one another, play together, and sometimes nudge each other playfully. If one animal in the group is stressed, the others will either comfort it or give it space. Sows sing songs to their piglets to soothe them. They maintain a close bond throughout their lives, as long as they are not separated.
Senses and Abilities
Sense of Smell
Pigs have an exceptional sense of smell. They possess 2,000 olfactory receptors, which is about twice as many as dogs. This means they can distinguish many more scents.
Sense of Taste
Their sense of taste is also highly developed, with 15,000 taste receptors. In comparison, dogs have only 1,700 and humans have just 350.
Sense of Touch
Their sense of touch is particularly strong in the area of their snouts.
Sense of Sight
However, their vision is not as sharp; they are nearsighted and struggle to perceive certain colors.
Intelligence
Pigs are as intelligent as 3-5 year old children. In fact, they are said to be smarter than dogs! They have an excellent memory, use tools for digging, solve puzzles, find their way out of mazes, recognize themselves in mirrors, and have a sense of time. They can even play video games: in an experiment, scientists discovered that pigs can move a joystick with their mouths to control a glowing dot on a screen. Understanding the connection between a screen and a glowing dot requires a high level of intelligence.
Life Expectancy
In fact, domestic pigs can live for 10-20 years. However, pigs raised for meat and sausage are typically slaughtered at just 5-8 months old, meaning they are still almost "kids" at the time of slaughter. Breeding sows are usually slaughtered at the age of 3-5 years because they can no longer produce enough offspring or due to poor living conditions that lead to illness or injury.
Enemies and Threats
Natural Enemies
Wild domestic pigs face threats from wolves, bears, big cats, domestic dogs, and coyotes.
Human Impact
The greatest enemy of pigs is humans. Each year, 1.47 billion pigs are slaughtered in livestock farming worldwide. However, this also harms us. According to the American Society for Nutrition (ASN), too much meat could be unhealthy and promote diseases. And it's really bad for the environment, too.
Deforestation for Growing Animal Feed
70-75% of the soybeans grown worldwide are used as animal feed because they promote rapid growth in animals. Pigs, cattle, chickens, and fish are primarily fed this, even though it is not their natural diet. To produce all this soy, vast forest areas are cleared every day.
Farmland for Growing Animal Feed
Significant agricultural land worldwide is allocated for soy cultivation, which could otherwise be used to grow other food crops.
Environmental Pollution
Pigs generate large amounts of manure, which contains pathogens and harmful substances (nitrates, phosphates, heavy metals, antibiotics). This manure can seep into groundwater and cause pollution. Additionally, the ammonia in the manure contributes to soil acidification.
CO2 Emissions
Pig farming accounts for about 9% of global CO2 emissions, significantly contributing to climate change.
Treatment of Farm Animals
Factory Farming
Over 99% of pork comes from factory farming. From birth to death, these animals endure suffering. Finishers are kept in cramped stalls without light and fresh air. They are slaughtered at just a few months old. Breeding sows are confined to crates - small metal cages that are exactly the size of the sows themselves. They can barely move an inch and must spend their entire lives as breeding machines, producing as many piglets as possible. These piglets will either become fattening pigs or breeding sows themselves.
'Humane' Killing
When we use the term "humane", we mean that we do not inflict unnecessary suffering on someone. Unfortunately, pigs in factory farming are not killed humanely. They are stunned with CO2, which is cost-effective and convenient. However, the animals experience panic in the CO2 chamber, desperately gasping for air before losing consciousness. Would you call that humane?
Is it Ok to Treat Pigs this Way?
Pigs are funny, cheeky, playful, intelligent, sensitive, and loving animals. They are not different from dogs – they just look different and lack fluffy fur. Does that justify causing them suffering and pain? What are your thoughts on this? There is a simple way to reduce the suffering and pain for pigs. Try plant-based alternatives instead. They are delicious and provide all the nutrients you need. Here you can find plenty of recipes and information on how to eat healthily and deliciously vegan: Vegan Challenge
Keeping Pigs as Pets
Pigs are incredibly intelligent and have a loving nature. As a result, the desire to keep one as a pet is growing. Miniature pigs or teacup pigs are particularly popular. However, even these can weigh 77-155 pounds (35-70 kg) - similar to an adult Labrador Retriever or a St. Bernard. The attempt to breed them smaller often leads to health issues related to the heart, joints, and kidneys. Additionally, it's important to remember that pigs are social animals and should ideally be kept in groups.
Reproduction
Pigs can start reproducing at the age of 6-8 months. The gestation period lasts about 114 days. A typical litter consists of 6-12 piglets, which weigh 2.2-3.3 pounds (1-1.5 kg) at birth and are nursed for 3-6 weeks. After that, they can begin to eat solid food.
Fun Facts
The most famous pig in the world is Miss Piggy from the Muppet Show.
The Pig Is Related To:
- Bushpig
- Warthog
- Wild Boar
Animals in the Same Biome:
Sources:
- „Acquisition of a Joystick-Operated Video Task by Pigs“ (https://www.frontiersin.org)
- "Smallest breed of domestic pig“ (https://www.guinnessworldrecords.com)
- „Greenhous gas emissions from pig and chicken supply chains“ (https://www.fao.org)
