In the premiere of this series following the work of Denver veterinarian Jeff Young and his staff at Planned Pethood Plus, a dog goes into cardiac arrest shortly after arriving at the clinic.

A miniature pig with an injured leg needs surgery, but it may not be able to handle anesthesia; a French bulldog has a routine dental exam that turns into a complex operation; the team ventures into the Rockies to help a couple who rescue sled dogs.

Dr Jeff and his team are pushed to the limit when a litter of 10 puppies comes in with a mysterious and deadly disease. Then, Dr. Jeff must work out what's wrong with a limping cat before performing complex hip surgery.

A dog may have a broken leg, but Dr. Young suspects it's a more serious condition that requires immediate surgery. Meanwhile, a veterinary technician must overcome her fear of birds; and a cat's appetite gets it in trouble.

A stray dog needs a home once it recovers from surgery that was required after it was hit by a car in Oklahoma. Meanwhile, a golden retriever needs immediate surgical attention after swallowing a pacifier.

A 5-month-old puppy that belongs to a homeless man has an injured paw; a dog in pain has X-rays that reveal a severe case of bladder stones.

A beagle is left at the clinic after it was attacked by another dog; a golden retriever has a broken leg; a technician shows a rescued kitten's owner how to feed it if it refuses to eat; a goat needs a botched operation fixed. Also: The staff visit a farming community to help with a feral cat population.

A runaway dog is brought in by animal-control officers after it got caught in a chain-link fence. Meanwhile, a dog has buckshot in its hind quarters; a large cat has a facial injury; a dog has a sore paw; and longhorn bull calves must be gelded.

An overweight cat with kidney disease struggles to survive; a dog is hit by a car while its owners are out of the country.

The staff hosts a fun run to raise money for animals in need; a dog requires emergency surgery after it's found tied to a fence; a stray Pomeranian finds a forever home.

When a beloved dog is hit by a car, Dr. Jeff battles to save his shattered leg. Then Dr. Amy takes on a new challenge treating 7 bad-tempered chickens. And a tiny kitten found unconscious at a construction site unites everyone in a fight to save it.

Jeff performs surgery on a pig for the first time; a dog is foaming at the mouth and requires immediate attention; Lindsay gets a surprise when she treats a sick goldendoodle.

A puppy with a broken leg is saved from a shelter in Oklahoma; a dog needs immediate treatment after eating a box of chocolates infused with marijuana.

A puppy has a broken leg after jumping off the back of a truck; Rachel tends to a cat that was injured in a fight with the dog next door; a fourth-grade class hopes Jeff can save their pet hedgehog.

Dr. Jeff races to save the legs of a puppy who has been hit by a car after getting loose. Newly hired exotic pet vet, Dr. Baier, treats a Burmese python that is losing weight.

Dr. Jeff battles to save a Bearded Dragon who is having a seizure. Then Dr. Nichols must figure out why a family's beloved dog is not eating and struggles to breathe. And, Dr. Amy is put to the test when a routine cat neuter turns complicated.

Dr. Jeff must act fast to save a kitten with head trauma. Then Dr. Amy treats a dog whose weak heart makes surgery a risk. A good Samaritan helps a family when their pit bull is hit by a car. And Dr. Baier gets a workout trying to treat two wallabies.

When two Chihuahuas are found abandoned in a storm drain, Dr. Jeff and his team will do whatever it takes to help them. Then Dr. Jeff makes a surprising discovery when a cat's bizarre eating habits put her life in danger.

Denver's busiest vet is back, with more patients than ever before. Dr. Jeff fights to help a dog walk again. Dr. Amy operates on a cat with a strange appetite. And the team heads out to a sanctuary to help an injured tiger.

Dr. Jeff operates on a dog rushed to the clinic after a growth on her neck ruptures. A family brings in their rabbit with mysterious growths on her side. And the team performs a risky procedure on a pair of rescued miniature donkeys.

An owner drives nine hours to the clinic hoping Dr. Jeff can save her dog's leg. Jeff and his team head to a wildlife sanctuary to treat a pack of wolves. And when a kitten with a deformed leg needs treatment, Dr. Baier steps up to the plate.

Two sisters rush their dog to the clinic with a life-threatening brain injury. Dr. Jeff is perplexed by a dog with a broken jaw. A fearless cat with a broken leg wins the admiration of the clinic staff. And the team treats some uncooperative yaks.

Dr. Jeff battles to fix a German shepherd's broken elbow and get him back to his worried owner, a disabled war veteran; a cat with a swollen bladder needs difficult surgery to save its life; Drs. Baier and Hector head to an exotic bird sanctuary.

Dr. Jeff must act fast to save a bulldog after a life-threatening accident; when devastating floods hit Louisiana, Dr. Jeff sends vet tech Hector to rescue pets left homeless in the disaster; Dr. Don operates on a cat with a bad habit.

In the Season 4 premiere, a black Lab swallows toxic metal; a lost cat is found after a one-and-a-half year absence, but has a mysterious injury; and a tiny dog has a big, life-threatening problem.

Dr. Jeff performs emergency surgery on a pit bull and makes a surprising discovery. Dr. Baier treats a goat kicked by a horse. A couple drives all night hoping the team can fix their dog's shattered leg. And an injured ostrich is taken care of.

A high-risk surgery is attempted to save the life of a beloved puppy; a 3-day-old orphaned kitten needs Dr. Baier's help to stay alive; a puppy is given a fifty-fifty chance of survival after it's rushed to the clinic with a deadly virus.

Dr. Jeff helps a remote town in Colorado overwhelmed by feral cats; a staff member's beloved dog needs emergency surgery; Dr. Baier gives some injured birds of prey a second chance; Jeff races to save the life of a family's precious Chihuahua.

Dr. Jeff performs surgery on Slash, a dog who can't keep his food down and weighs 20 pounds less than he should; Winter the cat has a bloody wound on his side.

When Dr. Jeff examines a beloved Weimaraner who has stopped eating, he makes a surprising discovery; Dr. Baier investigates the cause of a pet rabbit's mysterious fur loss; a servicewoman asks Dr. Jeff for help with her Pit Bull's injured leg.

Dr. Jeff must perform a rare surgery to save a pup with a deadly illness; a young pregnant woman counts on Dr. Amy to help her badly injured cat; Dr. Jeff and the team head to a wildlife sanctuary to treat a pride of lions.

Jeff and his team head to a remote town where they encounter an animal they never expected to see in Colorado; in Denver, a dog is rushed into the clinic after jumping out of a moving truck; Dr. Amy treats a kitten with a mysterious injury.

When a puppy is kicked in the head by a donkey, Dr. Jeff is her only hope. Later, Jeff goes fishing for a hook stuck in a beagle's throat, and Dr. Amy helps a cat unable to walk. And, Dr. Nichols gets caught up in a wrestling match with an alpaca.

Dr. Baier races to save a young couple's cat after it is hit by a truck. Dr. Don operates on a basset hound with an unusual appetite. And, Dr. Jeff and his team head to Mexico to provide desperately needed vet care to the community.

A girl hopes Dr. Jeff can save her puppy from a deadly virus; a stray cat with a life-threatening injury; Dr. Jeff must gain the trust of rescued wolves to help an ailing member of the pack.

Dr. Jeff treats a dog with a mysterious injury. Dr. Petra helps vet tech Jes' Dalmatian after it eats something toxic. A neglected turtle needs a new home, and the team falls in love with a litter of stray kittens

A dog is lost during a windstorm; Dr. Baier treats a small bird that has a big personality; a paralyzed dog is abandoned; an alligator is injured in a fight.

Dr. Jeff helps a dog with a serious illness; Mel and her daughter rescue a baby squirrel; Dr. Jeff and Dr. Petra team up to save a beloved cat hit by a car; Dr. Baier gives a rabbit owner a surprise; a tiny dog with a big spirit needs a home.

Dr. Jeff treats a skittish Savannah cat with an unusual condition; Dr. Amy helps a beloved dog who was injured chasing a coyote; the team tries to find the owners of a dog rescued on the highway.

Dr. Jeff gives hope to a concerned owner when their dog is diagnosed with cancer; the team cares for a litter of abandoned kittens; Dr. Amy solves the mystery of a beloved cat's painful injury; Dr. Jeff and Hector help a rescued tiger find love.

Dr. Jeff and Hector help 40 miniature Australian shepherds rescued from a puppy mill; Vet tech Christine turns to Dr. Jeff when her elderly Chihuahua has trouble walking; Dr. Jeff is called out to treat an alpaca with a serious infection.

Dr. Jeff helps a beloved German Shepherd walk again; the team tries to rescue a scared dog on the loose outside the clinic; Dr. Don must move fast when a family cat eats poison; Dr. Jeff and Hector head for the mountains to help two rescued camels.

Dr. Jeff returns from a free vet care clinic with a dog who was hit by a car; the owner of a kitten with suspected ringworm gets more than she bargained for; Dr. Jeff treats a family dog with a mysterious lump; Dr. Baier falls for a rescued puppy.

Dr. Jeff and his team head to a remote town to provide low-cost pet care; Dr. Petra performs life-saving surgery on a basset hound hit by a car; a cat with plenty of attitude needs Dr. Amy to treat his mysterious wound.

Dr. Jeff treats a couple's cherished bloodhound puppy that won't eat; Dr. Petra races to save a cat after it swallows a handful of hair ties; Dr. Jeff and Hector head out to a veteran's ranch to help a baby therapy yak.

A celebration of Dr. Jeff's 30-year career helping pets around the world; a behind-the-scenes look at the clinic where Dr. Jeff and his team remember some of their favorite stories.

Dr. Jeff helps a puppy with a mysterious and painful injury; Shelter volunteers drive from Kansas hoping Dr. Jeff's team can save a tiny rescued dog hit by a car; the team travels to Tennessee to help Jeff's cousin provide free vet care.

Dr. Jeff and his team continue their work through the chaos of the COVID-19 pandemic. A beloved dog is hit by a car and needs surgery to save its leg, and a cherished cat is rushed in with a mysterious bleed. A puppy is suspected of eating DVDs.

Dr. Jeff performs a surgery he's never done before on a dog with labored breathing. A senior canine was abandoned by his owner and the staff must find him a new forever home, while neglected ornate box turtles are saved by Dr. Baier.

A daredevil dog is saved by Dr. Jeff after it jumped from a fast-moving car on the highway. Dr. Don solves a medical mystery, while a couple's mischievous rescue guinea pigs cause a stir.

Dr. Jeff performs surgeries with the help of two vet students. A tribe of fainting goats is seen by Dr. Jeff and Hector, while Dr. Amy discovers why a cute and cuddly kitten is teary-eyed.

Dr. Jeff and his team lend a hand at Lakota Reservation in South Dakota. Back at the clinic, Amy debates emergency surgery for a French bulldog who ate his favorite toy, while Susan finds the perfect forever home for a lovable canine called Koda.

Dr. Jeff reveals the cause behind a beloved senior dog's mysterious lump. A cat called Tigger is monitored for unusual eating habits. An owner learns the perils of purchasing her pup online after it becomes sickly, and Petra shows off her guinea pigs.

Dr. Jeff and Petra train new vets at a wildlife sanctuary in Mexico. While there, they spay an endangered jaguar, and help an injured osprey. At the clinic, a Great Dane comes in with wounds after battling an air conditioner.

Dr. Jeff discovers a large mass on a loveable canine. Dr. Don helps Kelly the vet tech with her dog's sun-damaged nose, while Dr. Baier and Hector join forces to treat wild bison.

Coco the Frenchie needs Dr. Jeff's help to remove a large lump from her face. Vet tech Christine faces her fear of birds while helping pigeons from Rocky Mountain Adventures, and Dr. Jeff and Baier aid a red-back turtle with an infected foot.

Dr. Jeff comes to the rescue of a pup that's fallen from a trampoline.

Dr. Jeff and vet tech Ben head to a remote island in Panama to help with the pet population. A feisty terrier loses the battle against a German shepherd pup, while a sickly Sphynx kitten has been relinquished and needs serious medical attention.

A litter of kittens is rescued; a dog is struck by a car.

A dog called Mac is rushed in after being hit by a car. Dr. Amy performs surgery on a canine called Rebel who was impaled with a stick, while Dr. Baier helps Kino, a hound in heat even though she's been spayed twice.

Dr. Jeff celebrates 30 years in business and answers questions from fans.

Dr. Jeff and the team set out to transform an abandoned restaurant in an old mining town into a clinic to serve the mountain community; Dr. Baier treats a sneezing parrot; Dr. Jeff hopes to save a Yorkie's broken ankle from amputation.

Dr. Jeff attempts to diagnose a dog's devastating mystery illness; vet tech Hector's daughter is tasked with caring for a mother dog and her seven pups; Dr. Baier volunteers to help find new homes for rescued rabbits.

Khaleesi, the golden retriever pup undergoes a life-saving procedure; vet tech Blaire faces heartbreak over her beloved senior dog, Zula; during the global pandemic, Dr. Jeff and Hector ensure pets from an elderly community receive proper care.

Dr. Jeff makes a shocking discovery when a rescued street pup named Kova comes in with a severely injured leg; little Fonda needs to find a forever home after being thrown from a car; Dr. Jeff builds his beloved dog, Fred, his very own swimming pool.

Dr. Jeff comes to the rescue of an injured raccoon found in an illegal trap; Dr. Jeff is thrown by a medical mystery when Gordo the chihuahua comes in with a fever; Bob the black lab suffers a deep wound after protecting his owner.

Dr. Baier suspects a ferret suffers from a spinal injury after being attacked by the family canine. Dr. Jeff travels to a wolf sanctuary to spay and neuter a desperate pack of wolf-hybrids, and three dogs are rescued from an overcrowded shelter.

Dr. Jeff preps a Shiba Inu for surgery after she's struck by a car, but test results reveal a grim reality. Dr. Baier performs his first-ever wild goose operation, and an obese Yorkshire Terrier struggling to walk begins a strict weight-loss plan.

Dr. Jeff and his team lend a hand at National Mill Dog Rescue and are eager to find Ginger the Pomeranian a forever home. A dog who loves to swallow household objects must undergo emergency surgery, and Jimmy the gecko gives Dr. Baier a surprise.

Dr. Jeff tackles challenging surgeries on a pit bull with a broken leg and a feisty kitten's torn lower lip; Dr. Amy treats a dog that's acting sickly after a camping trip; Dr. Don handles a bladder stone removal on vet tech Christine's family pet.

From a stray dog saved by life-changing surgery to a pair of tortoises rehabbed after years of neglect, rescued animals get not just medical care but a second chance at life.