Monsters ResurrectedTV Show

This episode features the Amphicyon ingens as the new top predator of North America, able to defeat Dinohyus using its intelligence and smaller size to outcompete it. After five million years of dominating the landscape, the bear dog grows bigger, but then Epicyon appears and competes with Amphicyon. They begin to attack and kill the offspring in their burrow, and in the end, the canids outcompete and kill off the bear-dogs.