I have changed changed my mind again. Now wereanimals can only be mammals and my reason is this lycanthropy is caused by a mutation that allows for rapid cellular breakdown and growth this means that a person with lycanthropy can assume their chosen form in minutes. This is also why lycanthropes heal quickly. The illness causes allergies to silver and wolfsbane amongst other things. Both silver and wolfsbane can be fashioned into weapons to harm and kill lycanthropes much more easily than with normal weapons. As humans, elves and most other races I have designed lack scales, feathers and hollow bone they cannot assume these forms. Mammals tend to follow the same template as each other hair, normal non hollow bones etc. if you chose an exotic mammal which processes features not present in humans, and I will look them up, expect me to reject it or put limitations on. Is this o.k Thomas, flying chicken and any other readers?