The idea that pigs are immune to poison might be a misconception stemming from a few things:
* Their diet: Pigs are omnivores and will eat almost anything, including things that would be poisonous to other animals. This can lead to the perception that they are immune, but it's more accurate to say they are less selective in their eating habits.
* Their digestive system: Pigs have a very efficient digestive system that can break down and process a wide range of food. This allows them to tolerate some substances that might be toxic to other animals. However, it doesn't mean they are immune to all poisons.
* Historical anecdotes: Some historical accounts mention pigs surviving exposure to poisonous substances, but these accounts are often exaggerated or lack scientific evidence.
It's important to remember that pigs are not immune to poisons. They can still get sick or die from ingesting poisonous substances.