Which is why hind limb fractures in wild rabbits (in rehabilitation) are euthanized=no hope of return to full function, which is what they need to escape predators. For companion rabbits, splinting or cage rest is attempted, but recovery results in limited or poor function (usually).
Comparison of Two Methods of Long Bone Fracture Repair in Rabbits
Journal of Exotic Pet Medicine, Vol 19, No 2 (April), 2010: pp 183–188