Peccaries

the collard peccary or the javellina is a species of peccary from the pliocene to holocene epoch. The peccary has very short tusks this is because it never stops chewing down it's teeth. The peccary has many predators which is why it gathers in flocks.

in the series...
a flock of peccaries were seen in the episode prehistoric washington dc when they were ambushed by a Bear dog.