There are hopes that a breakthrough in the repair of damaged spinal cords in dogs may pave the way for similar operations for humans.
UK researchers have managed to repair severe spinal cord injuries in dogs by injecting their spines with cells taken from the lining of their noses.
The cells helped repair the parts of the nerve cells that transmit signals, meaning the canine patients can move their once paralysed limbs.
Jasper the daschund had a severe spinal cord injury that paralysed his back legs.
Now he can keep up with the treadmill on all fours and owner Peter Hay is thrilled.
"Before the event he was effectively a crippled dog - he had no rear leg function, he dragged his feet around and generally couldn't get up on them - he couldn't move them," he said.
"But now he can stand, he can get two feet, he can walk."
Jasper is one of 23 pet dogs with severe spinal cord injuries who were injected with cells taken from their noses - olfactory ensheathing cells - which usually work to maintain and repair the pathway between the brain and the nose.
It is part of the first randomised controlled trial to test the transplant in real life injuries, rather than in a controlled clinical environment.
The study was a collaboration between Cambridge University and the Medical Research Council in the UK, and the findings are published in the latest edition of the journal, Brain.
Co-author Professor Robin Franklin told the BBC the same technique should be able to restore some movement in people with spinal cord injuries.
"This is a procedure that should be tried in humans, however there are two important caveats," he said.
"One is that the outcome isn't consistent, so we shouldn't expect all individuals to improve as a result of this intervention.
"And the other is that because we haven't been able to recover all of the functions that are lost in spinal cord injury, the real cure to spinal cord injury is going to be a multi-component approach, of which cell transplantation will be one component."
The director of Monash Immunology and Stem Cell Laboratories, Professor Richard Boyd, said it was a very promising study.
"For people out there with any kind of spinal cord injury, any kind of news is good," he said.
"This is a particularly difficult condition to treat - in humans there's almost no treatment available.
"I think any translation between an animal study and a human has to be viewed with great caution, but in this particular instance these are relatively large animals, not mice or rats in a laboratory, but dogs.
"So I think that there is some hope that this kind of study can be applicable to the human condition."
- Science, Social Science, & Humanities
- spinal cord injuries