The number one Spaniel in the US, the American Cocker is in three varieties: black, other solid colors and particolor. This black specimen (with tan) displays the elegant style of a show dog with well groomed hair. 
The American Cocker is a Spaniel with a small, compact body that stands out for its refined, chiseled head and beautiful coat. The skull should be rounded but not exaggerated and tending to flatness; the eyebrows and stop marked; smooth cheekbones; wide and deep muzzle with square and even jaws; marked forehead. The eyes are round and full, eyelids slightly almond shaped. The ears are long and fine, with abundant hair. The neck is long; the shoulder well sloped backwards. The back is strong and descendent; the tail, docked; the chest, deep and wide; the forelegs, parallel and straight, close to the body; good hind angulations; compact and large feet, with hard pads. The coat is silky, smooth and slightly wavy, with long hair at the ears, chest, abdomen and limbs. The three American Cocker varieties by color are the black (completely black or with tan at the limbs, never with white); any other solid color that is not black (ASCOB); and particolor, which includes roan (basic color cannot exceed 90%). Ideal height for the male is 38 cm, 2.5 cm less for the female.
The American Cocker is still a popular choice as a company dog for many reasons. It is small, easy to handle and especially affectionate and graceful. An American Cocker does anything to please its owners. A cheerful domestic dog, but it demands time and patience from its owners. Even an American Cocker with short hair demands time to keep its hair in conditions. This time and effort is also necessary to avoid the dog odor. The American Cocker has fewer tendencies to hunt than other Spaniels that have not been as separated from their activity. Its attractive appearance, beautiful head and sweet nature will continue winning adepts as long as there are dogs.
Golden enters the ASCOB variety (any other solid color except black); and that is the most popular color in this breed. 
The particolor is gaining popularity in large leaps, this white and black is an extraordinarily beautiful example. 
The American Cocker weighs about 170 g at birth. It grows quickly and at eight weeks it should weigh between 2 and 3 kg. The tail is docked (leaving a third) and dewclaws removed, if having them at birth, between the third and sixth day. The American Cocker usually reaches its maximum weight at around nine months, although the female reaches maturity between 11 and 13 months, and the male, between 12 and 16 months. The puppy should be extrovert and not show any fear. Insist on sanitary information, since there can be a lot of health problems in such a popular breed. The American Cocker sheds its puppy hair at around 11 months, and in this period the hair tends to knot easily. Tendency to knot will also depend on the amount of hair it has. It should be brushed daily to keep the hair impeccable and knot free. Diet should be distributed in twice a day until the seventh month, and afterwards once a day, according to the dog and activity level, metabolism, etc.
If you have good memories of the American Cocker in your childhood, be even more careful of choosing a well bred specimen. Read closely as much as you can about it and make timely questions before taking this lovely and happy dog.
Due to the charm and love for this breed, the owner should be willing to care for its abundant hair, as well as its pretty eyes and long ears. 
Probably due to its large popularity, the Cocker Spaniel can have a lot of health problems, although many are not important and can be treated with an early diagnosis and good care. Amongst eye problems are progressive retinal atrophy, cataracts, primary glaucoma, and keratitis – ask about it and insist on an eye exam. Entropion, ectropion and cherry eye are other known problems. Skin problems are very common, especially allergy, dandruff, epidermic cysts and labial pyoderma (blotches over the labial crease) outbreaks. Black specimens are more prone to malign mouth cancer. Hip dysplasia and kneecap luxation, for which we should never, chose a puppy with affected parents. The American Cockers affected with cardiopathy respond well to taurine supplements. Some breeding lines are prone to pulmonary stenosis, hypothyroidism, distichiasis, kidney stones and metabolic liver problems. The American Cocker can be an excellent partner for 15 years.
Many breeders are crossing colors in the American Cocker: results are exciting, but the primary object should always be primary structure and health.