A group of pigs is commonly referred to as a sounder. This term is typically used to describe a group of wild pigs or boars. However, when referring to domesticated pigs, they can also be called a herd or a drift.
The term sounder originates from the Old English word sundor, which means ‘separate’ or ‘apart’. This reflects the behavior of wild pigs, which often form small, separate groups.
In summary, whether you’re talking about wild or domesticated pigs, the most accurate term for a group of pigs is a sounder.