They are generally found in packs of three to four, but are occasionally encountered in pairs or even by themselves. In addition to increased aggressiveness, they are also highly resistant to pain. Their incisors show increased enamel and dentin growth, making them razor-sharp. Mole rats exhibit no signs of increased intelligence when compared to those alive pre-War.
A number of people in the wastes have been known to train them and keep them as pets.
However, they were still greatly mutated by the subsequent radioactive fallout, increasing their size and aggression. They have survived as a species by burrowing underground where the soil protected them from direct nuclear explosions. Mole rats are mutated rodents that are much larger than their ancestral species prior to the Great War.