On Were-Creatures by Axton the Wolfsbane

Summary of relevant observations:
Fenrir: A giant wolf of roughly 8 feet in height, created by Old Knocker. A great beast far more intelligent than any normal wolf (and I daresay many humanoids). While in appearance no more than a wolf that ate more than he should have, his bite is the original source of the were curse. His children however find themselves to only be oversized intelligent wolves. I was once told by a bartender who I can only assume was reputable that one of his children forsook his father's ways and travels the world on his own. He is the leader of one of the three great packs of were-creatures
The Curse: The were curse can be obtained in one of two ways. First, one may be bit by a were creature, after which, on the next full moon they will involuntarily become a were version of whatever creature bit them (so if one must hunt a werewolf, it would do well to avoid getting bit if a full moon is near). These victims are called Cursed. If cursed, one must seek a cleric or healer to remove it before the next full moon. If an animal or monster is bit by a were creature, they become a were version of their own species. So for example, a werewolf biting a deer will create a deer that becomes monstrous (Unfortunatley for the deer, the curse does not increase intelligence so it will remain a painfully dumb animal). The other way to contract the curse is to drink the blood of a were creature and become what is called a gifted. This causes an immediate transformation and cannot be reversed under any currently known circumstances. If a cursed is bitten by Fenrir, they will become gifted. Werewolves are also immune to all disease and when you first turn all diseases already contracted will be cured.
Behavior: All were-creatures develop a taste for meat. They have bipedal capabilities and can reproduce through conventional means. They all spread the curse through biting or allowing their blood to be drank. Among creatures, the were curse is an equalizer. They surprisingly are all united by a pack mentality and tend to stay together with other were creatures. Even predator and prey will work in tandem with no issues. This most likely has to do with their meat tasting of ash to all including other were creatures, and so they have no primal reason to wish violence on each other. They tend to gravitate to packs but have occasionally been known to operate alone, especially those that shun their own monstrous nature. They all feel a deep desire to continually eat when in their monstrous form, with ravenous hunger racking their bodies any time they transform. This need causes them to give into their animal impulses and often end up killing livestock (or more high profile targets if they are desperate). For these reasons, it is illegal for a werewolf to enter most cities, and are shunned from most of society. Roughly half of all were creatures are among the three great packs, while the other half are scattered around the world in smaller packs, alone, or in hiding.
Cursed Werecreatures: A cursed is physically identifiable by appearance (basically they'll look super disgusting). A transformed monster or animal will resemble a much larger and stronger creature stuffed into the skin of its non were form. A transformed human will take the worst appearance traits of the humanoid and the creature, and somehow look even worse together. They tend to be monstrous with patchwork fur and bare skin in random patterns, joints not fully turned from human to animal form, and a face even their own mother couldn't love. They transform involuntarily when under extreme stress, and find the transformation easier to happen when the light of a full moon is visable. The transformation is a painful experience as they feel their entire physiology reform. They then find themselves with more violent tendencies than before, but not entirely without their humanity. They lose a taste for all food other than meat (and strongly prefer their meat raw) in both their humanoid and monstrous form. A cursed can be cured by drinking the blood of the creature that bit them.
Gifted Werecreatures: A gifted physically appears as a more complete animal in their transformed form. Up close one will notice that they retain a vague humanoid shape, but from a distance if they are on all fours, they will simply look like a large version of their were animal. Upon drinking the were-blood they will start their first, painful transformation. During which they have very little control over their violent tendencies. After this, they may voluntarily transform at any time while experiencing only a mild discomfort that I can only assume is considered socially weak to express as I have never known one to complain. They also tend to retain all of their mental faculties in their transformed state. Under a full moon they gain more strength in their transformed state than they already have. The downside is that you permanently have red eyes and animistic features in your humanoid form, for example one might have more pronounced eye and canine teeth. I even heard of one unlucky (or from some points of view, lucky) individual bit by a were-leemur that grew a tail! A gifted will most likely find themselves shunned from civilized society for the dangers they represent and difficulty hiding their features. With their more civilized tendencies, they can tolerate non meat food though still prefer the flesh of other creatures.

The Horde: The largest pack is led by Fenrir. They live the best out of all the packs and so they represent 25% of all were-creatures. They give into their desires and while they do hunt animals and creatures when convenient, they see no difference in hunting humanoids for food, sport, and protection. They represent the were creatures shunned from society and use the anger of their members to keep the pack strong and willing to fight humans.
The Hunters: Atrac the Son of Fenrir is the leader of the pack dedicated to protection of were kind. They do not actively seek out humans to hunt and kill but see nothing wrong with the action, especially if they threaten the lives or prosperity of other were creatures. They are the most active group in the war against the vampires in the blasted wasteland. The dangerous nature of living in the pack with little to show for reward keeps them only representing roughly 5% of the were population, but among their animalistic natures fame through valor and battle has its worth.
The Dwellers: Helena the first victim of Fenrir was so disgusted with her change that she went off alone to avoid falling into her new evil impulses. She instead chose to embrace the base animal that was now part of her and hunts animals exclusively for sustenance while attempting to avoid civilization for fear not only for herself but also that she wouldn't be able to wrestle away her more feral impulses. Her way of life gained favor with the cursed humanoids that hated their monstrous nature and she gained a following. Despite being the least prosperous of the three great packs, the Dwellers represent 20% of the population as most were creatures that wish to not embrace the terrible aspects of their nature seek them out.