Officers and vets fight for the life of a canine crash victim.

Kittens with blinding injuries; emotional dog rescue.

A dog falls out of a window; a kitten with a terrifying infection fights for her life.

An endangered duck is saved; a dog undergoes surgery for tumors; an elusive cat is rescued, but seems too feral for a home.

Officers rescue a stranded dog and rush a stray riddled with porcupine quills to the vet.

A litter of puppies reunites with its mother; challenging eye surgery for Dr. Patti.

One of the largest and most popular zoos in the U.S., Ohio's renowned Columbus Zoo and Aquarium and its conservation park The Wilds, houses more than 10,000 animals on 12,000 acres. It's also the part-time home of beloved wildlife guru Jack Hanna, the zoo's director emeritus. Now, Nat Geo Wild is taking viewers inside the grounds and allowing them to experience what visitors can't: compelling, heartwarming stories, and behind-the-scenes moments and adventures. "Secrets of the Zoo" introduces both the animals and the legions of workers who create unforgettable connections between people and wildlife.

Making a lucrative living certainly isn't a motivating factor for wildlife caregivers. It's a profession that appeals to those with a strong will, a big heart, and a love of wild animals. In rural western Kentucky, the dedicated individuals featured in "Wild Bandits" rescue, rehabilitate and release injured, sick, and orphaned wild animals. State-licensed volunteers like Kristin Allen, who works for the Kentucky Department of Fish and Wildlife, answer emergency calls day and night, and coordinate with other rehabbers to provide the best care for each species. Despite the constant sacrifice of time, money and sleep, these caregivers make sure the animals come first -- with the ultimate goal of one day returning them back to the wild.

In the varied forms of veterinary medicine, Dr. Susan Kelleher's practice may be one of the more unusual. Known as Dr. K, she runs South Florida's Broward Avian and Exotics Animal Hospital, and this series follows the staff as it cares for rabbits, ferrets, foxes, fish, birds, reptiles, marsupials, and even primates. As do some other vets, Kelleher thinks domesticating wild animals like monkeys is a bad idea, but that feeling doesn't interfere with her taking care of them: "If it will fit through the door, I'll treat it," she says.

Thinking of adopting a dog, or just love cute puppies? "Puppy Days" tells all about the roller-coaster experience of raising young canines by showing the successes and mistakes of pet parents. Embedded with six first-time owners who have decided to dramatically alter their family dynamic, the series begins at the moment the pups arrive, then tracks the early stages as dog and family adapt to each other. A puppy learns quickly during its early infancy, but by 18 weeks its ability to accept and learn new things reduces dramatically. The families have just over two months to train their puppies the right way or face the consequences. Included are do's and don'ts of teaching pups how to sleep through the night, behave for vet visits, socialize with other dogs and more.

On the Hawaiian island of Kauai, people in need of medical care for their pets often turn to Dr. Scott Sims. The owner of Pegasus Veterinary Clinic, located in his Kilauea home, Dr. Sims and assistants Dia and Ella keep busy treating a wide variety of domestic and wild animals. He makes "house" calls, too -- on beaches and mountainsides, in the water and jungle -- traversing wild, rural and oceanic Kauai topography. "Aloha Vet" profiles a man whose phone is rarely silent. With a heart of gold, Dr. Sims works long hours helping animals that walk, crawl, fly and swim.

The challenges never stop for world-famous dog behaviorist Cesar Millan. In this series, not only does Cesar help dog owners with simple take-home tips for problem pooches, he and his son Andre hit the road to honor and support the nation's many heroes in the pet industry. On an RV journey that spans from Philadelphia to Los Angeles, the hosts uncover inspirational K-9 stories and connect with organizations that are rescuing and rehabilitating dogs. No pup and pet-loving person is spared as the Milans profile groups helping veterans and their service dogs, community-run animal rescue teams training K-9 police dogs, and therapy dogs that help children with autism.

Dr. Michelle Oakley is a veterinarian in one of the most rugged environments on Earth. In addition to running an animal clinic out of her home in Haines Junction, Yukon -- where she lives with husband Shane and their three daughters -- Dr. Oakley also operates a satellite clinic 150 miles away and is the on-call vet for the Yukon Wildlife Preserve, which is about 100 miles from Haines Junction. She also makes house calls, sometimes driving for long stretches through desolate wilderness to check on a patient. This series presents enhanced episodes of "Dr. Oakley: Yukon Vet," which documents how the good doctor juggles being a full-time vet, wife and mom, and does so with a sense of humor and devotion.