Three kitten litters come of age, from first steps to daring kitty pounces.

Labs, Shih Tzus and Golden Retrievers live their first few adorable months.

Pugs, Mini-Australian Shepherds and Rottweilers come of age.

For these Savannahs, Siberians and Shorthairs, the first few months are an epic adventure. Whether in a house filled with guinea pigs, turtles and mice; or running off to explore strange new realms, these kittens keep their parents on their paws.

Three litters of kittens grow from helpless furballs to rambunctious young kittens in this epic story. Hairless Sphynx who redefine 'cute', agile Burmese exploring new heights, tiny Ragdolls befriending German Shepherds - this is a new level of cute!

American Curl, Tonkinese and Maine Coon kittens pounce through kitten-hood.

Rhodesian Ridgeback, Chow-Chow and Havanese puppies go from cute to cuter.

Jack Russell, Portuguese Water Dog and Bullmastiff puppies come of age.

Cuteness is provided by Coton de Tulear puppies, a baby goat and a bulldog.

A tuxedo kitten meets a skunk. Russian blue kittens have a grand adventure.

Nanook, a shy Chinook, is the only boy in a litter of four, training to be a sled dog. Rocky, the Labradoodle, and his brother Stanley grow up poolside. And Rollo and Pickles are wiener dogs who aspire to be athletes like their champion hot dog mom.

A shy Cavalier King Charles Spaniel is coaxed out of her shell by her aunt. Then, everyone wants to be top dog in the Alaskan Malamute home. Finally, three dalmatians grow into their spots as they show off their skills at the local fire station.

The most adorable interspecies animal friendships! From roly-poly ragdoll kittens and their German Shepherd playmate, to mini-Australian Shepherds and their quacking duckling pals, it's an extravaganza of cute.

A pit-bull puppy learns to walk. Chinese crested puppies find a turtle.

A toyger kitten overcomes her shy nature to befriend a large housemate.

A wrinkled shar-pei guards his toys. A cairn terrier goes on an adventure.