Bear dog

The bear dog or amphicyon ingens was a large species of caniform that lived in the pliocene epoch it had a bone crushing bite  similar to that of a hyena but stronger. It lived in almost all the continents except for Australia and Antarctica. Amphicyon was huge at 2.5 metres long and weighing 180 kilograms with the tenacity of a dog and the strength of a bear it was easily an apex predator. It had huge paws which it used to smack it's prey to the floor and end them with a killing bite. Amphicyon appeared in the episode prehistoric washington dc.

Trivia

 * Amphicyon was an apex predator alongside archaeotherium,the terminator pig.
 * Due to it's huge size amphicyon wouldn't need to hunt in packs unless dealing with huge prey.
 * Amphicyon was fast for it's large size.
 * Amphicyon was first discovered by Blainville in 1841.

In the series...
Amphicyon first appeared in prehistoric washington dc seen stalking a herd of peccary and then stealth ambushing one by smacking it in the face and knocking it on the ground to deliver a bone crushing bite.