Are pigs destructive?
Pigs can be destructive, but are not always destructive. It depends on the pig. If the pig is usually very calm and collected, it isn't very destructive. If it is usually hyper and angry, it is usually very destructive. It also depends on how tame the pigs are. There are a number of factors that play into this, but pigs can be destructive. Most of the time, they aren't.
Most of the time, no. However, they can get defensive if needed.
Pigs are pack animals. If they are the same size and get along, then they will be fine. It is difficult to introduce a new animal to the pack. If you have a few pigs of similar size, keep them together so that they don't get bored and destructive. Reasons to separate pigs are quarantine, fighting, and farrowing.