You may ask any of the Cavalier King Charles Spaniel puppy owners, I believe that you will never hear any complaints from them.
This is because Cavalier dog is friendly, sweet and gentle dogs which suitable to be family pets.
"Cavalier King Charles Spaniel Dog Breed Information and Pictures"
Cavalier King Charles Spaniel vs Human
The Cavalier King Charles Spaniel is perhaps the largest toy breed. It has other names like Cav, Cavalier and Cavie.

History and Origins
Cavalier originated in the 20th century but has its roots in the older King Charles Spaniel of the Restoration.
Group
Cavalier King Charles Spaniel is recognized as Toy Group
in both American Kennel Club (AKC) and The Kennel Club (UK),
same with Havanese dog breed
and Pug dog breed
Living Condition
Cavaliers are average active dog that are doing good with apartment or condominium life.
They are doing good with country house that have a yard too. These dogs hate warm weather.
Exercise
You should not exclude Cavalier from exercise, especially the daily walk.
The 45 minute walk daily is used to drain his energy so that he will not develop any behavior problems.
Shedding
Cavies are average shedding dogs. So, regular grooming is to be expected.

Picture of an Adult Cavalier
"Cavalier King Charles Spanial Physical Appearance, Characteristics, Temperaments and Average Life Span"
General Appearance
The Cavalier has a full-length tail, well-feathered with long hair, which is usually not docked,
which is typically carried aloft when walking.
The Cavalier's head is nearly flat between the ears and has a well defined nose,
its eyes are large and round and this gives the dog its characteristic endearing look.
Its neck is strong and is slightly arched and its ears are long and drooping and have plenty of feathering.
The body of the Cavalier is small but well balanced, this dog moves with a somewhat elegant and royal gait.
Coat and Color
This small dog breed has a silky coat with moderate length. Four common colors are Blenheim, Tricolour, Black and Tan, and Ruby.
Size
Height: 12.0 - 13.0 inches (30.0 - 33.0 cm)
Weight: 10.0 - 18.0 pounds (6.0 - 10.0 kg)
Average Life Span
9 - 14 years
Average Litter Size
4 - 5 puppies
Characteristics/Temperaments and Energy level
The breed is highly affectionate. Most dogs of the breed are playful, extremely patient and eager to please.
They are friendly and non-aggressive toward new people or children.
As such, dogs of the breed are usually good with children and other dogs.
A well-socialized Cavalier will not be shy about socializing with much larger dogs.

You may share a story about your experience with your Cavie like how you train your Cavie, the methods you used to fix any dog behavior problem and dog tricks that your Cavie loves.
Other Cavie owners love to hear from you!