This episode reveals what happens when animals living at extreme altitudes, from high on mountain summits to down in the ocean depths, turn on their own kind. Bringing you closer than ever before to the most awesome and adrenaline-packed fights in the unforgiving battleground of Earths highs and lows. From a bald eagle earning its wings in aerial combat, to the dog-eat-dog world of coyote pack fightsits a no holds-barred fight fest at every altitude.

Deep in the Costa Rican rainforest, Dr. Oakley tracks an animal essential to the biodiversity of the area, the elusive and endangered tapir. Later at Toucan Rescue Ranch, a group that rescues and rehabilitates wildlife, the team races to save a pregnant sloth after she was electrocuted. Dr. Oakley treats a Caracara with cancer, Sierra faces her fear of monkeys, and a group of animals is released back into the wild.

From the rookie tiger whose hunger for territory ends in fatal violence, to the monster-sized monitor lizards who fight like pro wrestlers for total dominance, and the python who goes hunting for lunch only to find himself on the menu.

In the freezing wilderness of Yellowstone National Park or under the blazing hot sun of the Sonoran Desert, wolf packs settle old scores, rattlesnakes tangle in combat dances, and even the charismatic prairie dogs show us their dark side.

This episode sails around the world to reveal what happens when natures fiercest shore dwellers turn on their own kind and brings you closer than ever before to the toughest and meanest fights along the worlds coastlines. From the frozen barren land of the arctic, to the tropical waters of Indonesia, Komodo dragons eat their own kind, and penguins use their flippers in frantic slapping battles. The beach party will have to wait: its a no holds-barred fight fest from the poles to the equator.

This episode reveals what happens when the Americas' wildest animals turn on their own kind and brings you closer than ever before to the toughest and meanest fights on the Americas' unforgiving battleground.

This episode reveals what happens when the Animal Kingdoms biggest and craziest fighters go head to head, and brings you closer than ever before to adrenaline-packed brawls from across the globe. Its a no-holds-barred fight to the death.

In the freezing wilderness of Yellowstone National Park or under the blazing hot sun of the Sonoran Desert, wolf packs settle old scores, rattlesnakes tangle in combat dances, and even the charismatic prairie dogs show us their dark side.

This episode sails around the world to reveal what happens when natures fiercest shore dwellers turn on their own kind and brings you closer than ever before to the toughest and meanest fights along the worlds coastlines. From the frozen barren land of the arctic, to the tropical waters of Indonesia, Komodo dragons eat their own kind, and penguins use their flippers in frantic slapping battles. The beach party will have to wait: its a no holds-barred fight fest from the poles to the equator.

Now that the pups have arrived, Dogtown is officially under new management. In the Flatlands, June tries to help her risk-averse pup find his confidence, while Ruby faces off against an invading Prairie Dog family.

With nourishing food scarce in the Highlands, Charlotte must learn to fight back against bullies to survive the harsh dry season.

Zambia's extraordinary Luangwa Valley is the perfect hunting ground for some of Africa's most iconic predators. Prides of lions, packs of wild dogs, clans of hyenas and solitary leopards vie for the upper hand in a land where the dry season brings prey to their doorsteps.

The Nsefu Pride of lions lives on the banks of the Luangwa River in Zambia. Experienced lionesses bring up a family of youngsters. Seven new cubs are born into the wet season - not the easiest time.

A family of wild dogs - the Hot Springs Pack - lives in a pristine corner of Zambia's Luangwa Valley. The alpha female has pups in the den, the latest of several litters she and her lifelong partner have had together

Zambia's extraordinary Luangwa Valley is the perfect hunting ground for some of Africa's most iconic predators. Prides of lions, packs of wild dogs, clans of hyenas and solitary leopards vie for the upper hand in a land where the dry season brings prey to their doorsteps.

The Nsefu Pride of lions lives on the banks of the Luangwa River in Zambia. Experienced lionesses bring up a family of youngsters. Seven new cubs are born into the wet season - not the easiest time.

Two big male lions, twin brothers with a powerful bond, have ruled the Nsefu Pride for three years - they're fathers to all the young, and protectors of their territory.

The story of a young male hyena, called Mizumu, embarking on the most challenging journey of his life; to find a new clan.

A family of wild dogs - the Hot Springs Pack - lives in a pristine corner of Zambia's Luangwa Valley. The alpha female has pups in the den, the latest of several litters she and her lifelong partner have had together

The Mwamba lion pride dominates the west bank of the river in Zambia's Luangwa Valley. But this family is facing an uncertain future.

Milo is a young cub in the mighty Mwamba pride, which rules a territory on the west bank of the Luangwa River. 20-strong it's ruled by the notorious Punks, a coalition of three strong brothers, it's the largest pride for miles around, giving Milo the best start in life. But, in lion society, cubs are the glue that binds a pride.

The Misfit is a charismatic cub who's had a rough ride. A timid oddball once bullied by his big brothers and rejected by his mother, this plucky young lion is now a teenager

Zambia's extraordinary Luangwa Valley is the perfect hunting ground for some of Africa's most iconic predators. Prides of lions, packs of wild dogs, clans of hyenas and solitary leopards vie for the upper hand in a land where the dry season brings prey to their doorsteps.

When rescue animals are in need, the vets dive into action! A dog's leg is smashed by a car and needs emergency surgery. A routine puppy check turns into a surprise for Dr. Nicole. Dr. Lisa treats a cow with a huge leg gash and a dog that was the victim of an attack. Dr. Pol handles two dogs with tummy troubles and a mare in stalled labor. A friendly fox and a black swan make visits to the clinic.

The also incredible Dr. Brenda has been a staple at Pol Veterinary services for over 21 years. The clinic staff and even some long-time clients reminisce about their fondest memories of working with Dr. Brenda while the good doctor has her hands full this week with Lady, a horse who's having trouble putting on the pounds and Little Matt, a dog with an enormous oozing wound on his belly. After a difficult week, Dr. Brenda, Andrea and Melissa enjoy a well-deserved night out on the town.

The African bush is thick with thieves. In Botswana's dark, criminal underworld, nothing and nobody is safe. Suspicion, injustice and terror rule supreme and crime does pay. Every animal must fight for what is rightfully - or wrongfully - theirs. Whatever the cost. In this land of cunning and mischief, when the going gets tough, even the most surprising characters are forced to turn to the dark side.

In the Kalahari, an animal's instinct to move is the key to their survival. At the mercy of the unforgiving dry season, a life on the move can be a dangerous and perilous existence.

Zambia's extraordinary Luangwa Valley is the perfect hunting ground for some of Africa's most iconic predators. Prides of lions, packs of wild dogs, clans of hyenas and solitary leopards vie for the upper hand in a land where the dry season brings prey to their doorsteps.

The African bush is thick with thieves. In Botswana's dark, criminal underworld, nothing and nobody is safe. Suspicion, injustice and terror rule supreme and crime does pay. Every animal must fight for what is rightfully - or wrongfully - theirs. Whatever the cost. In this land of cunning and mischief, when the going gets tough, even the most surprising characters are forced to turn to the dark side.

It is the week before Christmas and all through the farms, Dr. Pol is still working inside the red barns! It's beginning to look at lot like Christmas in Michigan as Dr. Pol heads to John Jourdan's for his first farm call of the day. Without a head chute, the set-up for these castrations is less than ideal but nothing Doc Pol can't handle. Meanwhile, Dr. Brenda races out to Rooftop Landing, where a reindeer named Ole is aching for a chance to pull Santa's sleigh. The end of the week finds the Pols in the mood for some holiday cheer.

Guinea pigs, tortoises, mares, and cows! From the largest to the smallest, it's a never-ending parade of patients at PVS! Doc treats a duck in distress while time is of the essence when a mare experiences choke. Charles and Abigail stop by with a pet of their own. Dr. Nicole examines an Eskie who had a run-in with a 4-wheeler and Lisa makes heroic efforts to save a cow and her calf.

The Mwamba lion pride dominates the west bank of the river in Zambia's Luangwa Valley. But this family is facing an uncertain future.