Barbaro is a magnificent, splendid animal. His best chance of survival is to gain some use of the leg - which may be so limited that he might never be able to stud. His owner's and caregiver's only wish is that he has a pain-free life. A thoroughbred's life is motion. They can not survive on three legs - the unequal weight distribution leads to a fatal infection of the hoof. Prosthetic limbs have been tried with very poor success. The best chance for this magnificent animal is to heal.
Thanks for the info. I never could understand, now I do.