Dogs are not. Next, the agility. This is debatable, but the evidence favors the tiger argument. Tigers, and all cats, have excellent speed. In fact, the cheetah is the fastest land animal.
Dogs have great endurance, but no remarkable speed.
The Pok dex only says that Arcanine has speed, not stamina. Also, the attack Take Down could be a clue. Besides, the larger canines can have trouble taking down a deer if they were in a pack, but tigers, the largest feline in the world that weighs about five hundred pounds, could easily take down a prey animal the size of a small moose. Although the head looks mostly canine, the shorter, feline snout betrays the look. Likewise, Arcanine s paws also look feline, without blunt extended claws.