* Technically: A hog is just a mature pig. There isn't a separate species called a "hog."
* Common Usage: In some contexts, "hog" is used to refer to a large, adult pig, especially a male one.
* Regional Differences: The term "hog" is more common in the southeastern United States, while "pig" is more common elsewhere.
So, when is a hog not a pig?
* Never, biologically. A hog is always a pig.
* It depends on context. If someone says "hog" they may mean a specific type of pig.
Let me know if you'd like more details about pigs!