My in laws have two whippets ( that are NOT worked, I might add ) and are always injuring them selfs, I have a beddi whip and although she is young, so not reli worked as such she hasn't had any injuries ( apart from an accident that happened when she was a very small pup) so for me my beddi whip is less prone to injuries, but every dog is different and there will be many different opinions. Atb