Dr. Oakley treats a cat that swallowed a string and a pregnant reindeer with cancer.

Dr. Oakley treats a limping bison and a litter of puppies struggling to survive.

Dr. Oakley tries to outsmart a herd of bison and fights for the life of a cherished friend.

Dr. Oakley faces a toxic emergency and removes the eye of an alpaca.

Dr. Oakley transports a bull by boat and sees chinchillas for a cuteness check.

Dr. Oakley performs a checkup on two scrappy lynx, and Sierra takes charge on clinic day.

Dr. Oakley operates on an unusual mass and investigates a musk ox with a hair loss problem.

Back in the Yukon, the Oakley's help over 100 cattle and a rowdy mini mule.

Dr. Oakley treats a kitten with a bulging eye, and Sierra preg checks a miniature cow.

Dr. Oakley treats a beagle mix with a severely infected paw and rappels to an eagle's nest.