Stranger things can be seen. I had a student who was severely pigeon toed and his toes literally pointed inward about -15/15. He physically could not ride duck or anything approaching a 0/0. We tried a few things from -9/12 and finally found a forward stance with the front foot at 3 and the back foot about 21 worked best for his condition. There are lots of medical issues out there and you will see some pretty strange shit but hey, whatever works and gets them on the snow having fun.
That was actually why he had a 0/0.. But the heel/tail setbacks were just strange haha