The pets would keep the Dwarves company and even defend them in times of need.
The underground can be an empty and lonesome place for dwarves.In times past it was common for Dwarven clans to have pets and companions to make the settlements more lively and festive. It became more uncommon with pets after the great magic war, but finally a lucky break came. A Game of Dwarves - Pets DLC Steam CD Key The Dwarves discovered a forgotten dragon lair with preserved dragon eggs, they befriended a pack of wolves, adopted a clan of furry cats .