A "bone crushing dog", E.haydeni, running in the North American plains of Miocene.
Epicyon ("more than a dog") is a large, extinct, canid genus of the subfamily Borophaginae ("bone-crushing dogs"), native to North America. Epicyon existed for about 15 million years from the Hemingfordian age of the Early Miocene to the Hemphillian of the Late Miocene. Epicyon, which was about 5 feet long, had an estimated weight of 150 pounds.[ Epicyon had a massive head and powerful jaws, giving its skull a lion-like shape rather than that of a wolf.
I made this super-dog in Artrage4 and PS CC2014,and used a photo background to place the animal in.Hope you enjoy it