Werewolf Facts

Werewolves in Supernatural

"What about a human by day, a freak animal killing machine by moonlight don't you understand? I mean, werewolves are badass. We haven't seen one since we were kids. You know what the best part about it is? We already know how to bring these suckers down. One of these bad boys right to the heart"

-Dean to Sam about werewolves in Heart

Werewolves, also known as Lycanthropes, are a race of partially-human  supernatural creatures, able to morph into a combination of human and wolf, that have been encountered by hunters such as Sam and Dean Winchester. It has been stated that werewolves and skinwalkers are cousins. In the early stages it can sometimes be cured with a transfusion of live blood from the sire werewolf.

Characteristics:

Werewolves are humanoid carnivores, the ultimate combination of wolves and humans. They feed on prey found nearby, which, due to the increase of urban areas, are mostly people. When they devour the flesh of a victim they leave a recognizable trace on the prey: they always eat the heart, although they do sometimes eat more of the body. The transformation only occurs after one bites a victim, the way werewolves continue the spread of lycanthropy. However, they are also capable of having children who are born werewolves.

In their form, their bodies change rapidly, changing into a fitting definition of predators. Their nails increase to sharp, long claws, fangs increase in size and eyes resemble those of a wolf rather than of a human.

Some of those who are bitten don't survive the change and the timing of the change can range from the next full moon to anytime at all with purebloods.

While it was believed for a long time that there is no cure for lycanthropy, the British Men of Letters came up with that worked on one out of nine mice test subjects: injecting the live blood of the sire werewolf. Of the two humans it was tried on, only one survived the process which was excruciatingly painful. However, this is said to only work in the early stages of infection. Like the vampire cure, it also won't work if the werewolf feeds.

According to Justin, werewolves are meant to live in packs, not alone. Losing his entire pack drove Justin slightly insane, changing him from a harmless werewolf into one that was desperate and willing to do anything to get the sense of companionship he had from having a pack back.