In the equine world, tendon and ligament injuries are bad news indeed. Among the many prized race and performance animals who suffer from bowed tendons or similar maladies each year, just 20% or so make a full recovery, and then only after a long and costly rehabilitation. The suffering and expense these injuries incur has led frustrated horse owners to try a host of different treatments for these injuries over time, some more evidence-based than others, and all without great success. Perhaps it was inevitable, then, that some in the veterinary world would turn to a therapeutic approach that scientists say holds such great promise in humans: stem cells.