It's a nice story, but it's not true. Oslo and Ivar's back legs were afflicted with a condition called "swimmers syndrome," that could be treated fairly easily.
Their front legs had a more serious problem - they were basically pointing out at 90 degrees below the elbow, due to a genetic problem likely caused by irresponsible breeding, and that would require expensive surgery to even try to fix.
"The doc called it 'bilateral congenital defect,'" says Swope. "Severe subluxation of their elbows."