Minecraft Dungeons:Pig

The Pig is an unattackable passive mob that spawn in some levels for decoration.

Appearance
The Pig's appearance is that of its normal default texture from the base game. They also use the same sounds aside from a unique knee shake sound.

Spawning
Two Pigs are seen in Camp within their pen, while others spawn in pens in the Highblock Halls and Lone Fortress and in other levels usually outside of the player's view to fit the ambience.

Behavior
The pig, unlike other mobs, does not seem to interact with players and cannot be attacked, except for a secret spot in the Lone Fortress level. The only way to damage them there is by using the Shockwave enchantment. It is likely that you cannot damage them in other levels because they are often found in the background of the level, oinking in the ambience. The ones within Camp cannot be killed either, but are seen frolicking around the pen. But for some reason, they are still affected by the Chilling enchantment.

Trivia

 * The pig is the only mob that does not interact with the player. In fact, some people consider it to just be decoration.