They took him to the veterinarian, where they discovered the issue. Joey Roo was born with radial dysplasia, a congenital condition.

The bones of the upper extremities grow shorter than expected or do not grow at all as a result of this disorder.

It varies greatly, but in the instance of Joey Roo, he only had a sliver of little legs that did not let him to stand or walk. He did, however, have a claw.