Meet Vincent the cat. As you might have noticed, he has a pair of prosthetic hind legs.
When he was adopted as a kitten Vincent was missing his back legs from the mid-tibia down.
To help Vincent live his best life his owner, Cindy Jones, took him to see the vet.
Vincent is one of only about 25 animals in the world who've ever had surgery like this, says Bergh.
Because of the nature of his injuries, Vincent's titanium-alloy implants have to go inside his bones and come out through the skin.
"The first time I saw him after surgery, it was scary, I'll be honest," Jones said in a video released by Iowa State University. "You don't normally see metal things poking out of your cat."
Vincent's prosthetic legs are short for now, but eventually they'll be lengthened until they are the same height as his front legs.
Vincent's first surgery took place in February 2014, followed by a second surgery in February this year. His legs have already been lengthened since then, too.
He's not able to yet, but Bergh hopes that Vincent will be able to jump using his shiny new hind legs soon.
Good luck Vincent <3
