Splinting helps if still young. Sea grass mats for better grip of floor. Check for pinched hindquarters
http://www.bio.miami.edu/hare/splayleg.html?fbclid=IwAR2yQRzhwBFNNvv4IIueL94ssFqTEPpsNXKxEGrASXmsnbIVPXOLyUk-zjo. Link no longer works so here’s a copy and pasted version
#splayleg
Bracing...