Visiting a reindeer herd; a moose has a giant belly.

Dr. Oakley tends to baby-related needs in Alaska.

Dr. Oakley pays a visit to various Alaskan pooches.

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Dr. Michelle Oakley, a veterinarian in one of the most rugged environments on Earth.

Dr. Oakley escorts a horse on a boat and treats a bull with a limp.

Dr. Oakley treats a limping bull bison and a dog with a mammary mass.

Dr. Oakley treats a horse with a limp and an overweight dog.

Dr. Oakley treats a dog with a bloated stomach and a cow with a lumpy jaw.

Dr. Oakley treats a miracle moose and a puppy that was hit by a car.

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.

Dr. Oakley herds a group of unruly reindeer and treats a breeding mini ram with a limp. Back in Haines, the team treats a dog with a mass and a supersized cat with painfully matted fur.

The Oakleys treat an electrocuted sloth, track the elusive tapir, and release rescued animals back into the wild.

In Costa Rica, Dr. Oakley treats jaguars, tackles an abscess on a tropical weasel, and determines if a rescued sloth can be released into the wild.