A group of pigs is commonly referred to as a "herd." The term "herd" is used to describe a collection of pigs, whether they are domestic pigs or wild pigs. Pigs are social animals and often live in groups, especially in the case of wild pigs, where they form social structures and engage in cooperative behaviors. In a domestic pig farming context, multiple pigs are often kept together in a herd or group for social interaction and management purposes.