Werewolf Species 1

Watching some Harry Potter makes me want to draw Mythical Beasts

The werewolf on the lefts head shot is a completely different species (Its and English/American Werewolf) while the one on the right has no name yet~ All the light gray coloration is it having no hair whatsoever, maybe they would have light hair like humans do on their arms, but its not thick like fur. They come in a manner of all natural coloring, some have more fleshy tones like their human form does, and have fur coloration either exactly like their human forms hair, or a darker version of it. They walk on all fours, being unable to walk on two legs. The only time they are on two legs if after transformation, surveying the area, or to look intimidating.