(CNN) Man's best friend gets a second chance at life; thanks to an extern.

Ollie, a 10-year-old Sheltie from Portland, Oregon, was moments from being euthanized when a veterinary extern spotted the problem that left the dog fighting for his life.

The dog's owners had a tough decision to make when his health started to rapidly deteriorate. Ollie wasn't eating or drinking, he couldn't eliminate on his own and was almost completely paralyzed.

After multiple tests and no sign of a solution, Ollie's owners, Al and Joelle Meteney, decided it was time to end his suffering.

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