Three delightful litters of puppies come of age; the first few months of Pugs', Mini-Australian Shepherds' and Rottweilers' lives are full of adventure, including an introduction to an agility course and lessons in duck-herding.

Featured are the epic adventures that take place during the first few months in the lives of Savannah, Siberian and Shorthaired kittens; cats grow up in a house full of guinea pigs, turtles and mice and run off to discover surprising, new territory.

The epic stories of three litters of kittens are followed as they grow from helpless "furballs" into rambunctious, young cats; hairless Sphynxes redine "cute"; Burmese cats explore new heights; tiny Ragdolls befriend German Shepherds.

Three litters of kittens pounce throughout the first few months of their lives; beautiful American Curl kittens get ready for life on the catwalk; a set of Tonkinese run circles around their mother; a Maine Coon shows his siblings who is boss.

Three litters of puppies go from cute to cuter during the first few months of their lives; a trio of Rhodesian Ridgebacks runs circles around their mom; fluffy Chow Chow puppies have heaps of attitude; a Havanese has her paws full with five puppies.

The coming-of-age stories of three litters are featured: three sweet puppies keep their Jack Russell Terrier mother active; a Portuguese Water Dog finds out that her litter may not be too fond of water; a Bullmastiff mother's four puppies keep growing.

Pit bull puppy Thor discovers an urban paradise where it can be free; Collie pup Little Magic must learn to keep up with its pack mates; Chinese Crested puppies Bella and Buttons, though opposite in appearance, team up against a strange new creature.

Raisin, a wrinkled Shar Pei, guards his toys from siblings Peaches and Pancake. Scout, a brave young Cairn Terrier, attempts an adventure all on his own. And Peanut, the smallest of a litter of Boxers, is steered to glory by his grandfather.

Five little piggies must befriend Penny the Spaniel and learn their new farm home; Clover, a mini-lop rabbit must assert herself with feisty brother Harley; Samson and Delilah teach their hoglet Pip and her spiky siblings about the great outdoors.

Godiva Kiss, a Birman beauty queen, is raising three kittens who may follow in her royal footsteps. Tofu, a Cornish Rex kitten, and his siblings befriend Donna the Iguana. Cutie, a tortoiseshell cat is raising twin brothers that are nothing alike.

An adorable showdown takes place between Pucci the Chihuahua and the new Royal Himalayan kittens. Singapura mom Jasmine has a hard time keeping up with her tiny, energetic brood. Short-legged and long legged munchkin siblings navigate the world.

Puck, a keeshond pup, befriends a flock of ducks on the farm while sister Tulip explores the woodshop. A little Great Dane named Marvin is adjusting to his fast-growing body. Cocker Spaniel pups look the same but certainly don't act the same.

Lab mix rescue pup Sally is never seen far behind brother Safari, Pomeranian triplets Sparrow, Wren and Finch carry on mom Star and dad Tucker's job of watching over a feathered menagerie and Ibizan Hound puppies Carmen, Figaro and Arabella try to out chase each other.

Anya the Doberman pinscher and her human best friend, toddler Kaylee, have a big job keeping up with Anya's 12 new puppies. Runt beagle pup Roo hopes his nose will help him hunt with his sisters. Show dog Bichon Frise Angel breeds her champion brood.

In this best-of episode: Bold little Maine coon kitten Lulu tries to help her dad get along with her siblings. Persian kittens prepare to be like their show cat mom, Truly Elegant. Siberian twins Mittens and Socks are rescued from the closet by Maksim, the cat of the house.

One dozen goldendoodles take over a home and a pet pig's bed; a Westie chases after her wandering twin brother; Swiss mountain puppies find their stride.

A foursome of Neo-Mastiffs have big paws to fill if they're going to be be guard dogs like their Mom. A shy Chihuahua puppy learns that her tiny family have big hearts. And a litter of seven English Setters compete for first place.

Irish terriers meet their bothersome teenage brother. 8 Corgis help on the farm, and an Akita puppy finds her place among her brothers.

Spotted Bengal kittens are bowled over by a lumbering Newfoundland. 4 fluffy Norwegian Forest Cats dip their toes in the surf at their neighborhood beach, and, at a rescue home, 2 kittens find their way into the den mother's heart.

Poodles, Basset Hounds and Bull Terrier puppies are featured.

In a litter of six Maine Coon kitties, only boy Maurice struggles to fit in with his sisters. A quiet kitten with a limp tries to find his voice in a litter of super-chatty Siamese cats. And a shy black kitten tries to befriend an older butterscotch tabby.

A shy Papillon puppy named Kitty comes out of her shell with the help of her siblings. A trio of St Bernard puppies follow their noses to big adventures. And finally, an Airedale Terrier named Merlin tries to disappear from her eight brothers and sisters.

A black-and-white kitten plays with its adopted brother, a baby skunk; an orange tabby kitten tries to befriend a canine housemate; a Savannah kitten seeks a playmate.

Four tiny Tibetan Spaniels - all boys - are born into a family of watchdogs. A extra large litter of Newfoundland puppies take to the water as they train to be rescue dogs. And a patchwork puppy tries to blend into a family of Retriever Mixes.

A bear cub befriends a lonely German Shepherd. A deer and a kangaroo have their world turned upside down by a mischievous lemur. And a pygmy goat has a hard time fitting in until he meets a shy puppy.