"American Cocker Spaniels:
If you want a dog who...
Is conveniently-sized and sturdy
Has a pretty feathered coat in a variety of colors
Needs only moderate exercise
Is friendly, or at least polite, with strangers
Is peaceful with other pets
An American Cocker Spaniel may be right for you
If you don't want to deal with...
An extremely careful search to avoid all the nasty, neurotic Cocker Spaniels
"Separation anxiety" (destructiveness and barking) when left alone too much
Frequent brushing, combing, and clipping
Lots of shedding
A distinctive odor from the skin and ears
Barking
A multitude of serious health problems
Excitable or submissive urination (tendency to dribble urine when excited or nervous)
An American Cocker Spaniel may not be right for you.
If I were considering an American Cocker Spaniel...
My major concerns would be:
Unstable temperaments. American Cocker Spaniels are a dime a dozen, and most of them are bred and offered for sale by people who don't have the slightest idea of how to breed good-tempered dogs. Obedience instructors and behavioral consultants see LOTS of American Cocker Spaniels with neurotic behaviors, including aggression, biting, moodiness, and general nastiness.
Defensive reactions. I don't know why so many Cocker Spaniels growl or snap when you correct them. They seem to have a heightened sense of "Hey, no fair!" As an obedience instructor, I'm extra careful when putting my hands on a Cocker Spaniel for a correction.
If you have small children, I do not recommend an American Cocker Spaniel. There are just too many Cockers who won't tolerate any nonsense. And there are too many Cockers who feel overwhelmed by the loud voices and quick movements that children can't help making -- and stress and shyness (even defensive biting) may be the result.
Separation anxiety. More than most other breeds, American Cocker Spaniels need a great deal of companionship and do not like being left alone for more than a few hours. They tend to express their unhappiness through destructive chewing and barking. If you work all day, this is not the breed for you.
Grooming, shedding, and doggy odor. To keep their silky coat free of mats, American Cocker Spaniels require regular brushing, and also clipping and trimming every couple of months. Cocker Spaniels also shed a great deal. Their hairs come off on your hands when you pet them, stick to your upholstery and clothing, and hide under the furniture. Finally, many Cocker Spaniels have a distinctive doggy odor that some people find offensive.
Barking. American Cocker Spaniels are often too quick to sound the alarm at every new sight and sound. You have to be equally quick to stop them.
Serious health problems: From hip problems to eye problems to skin problems, American Cocker Spaniels are one of the riskiest of all breeds in the health department." (Michelle Whelton)
English Cockers haven't been as overbred as American Cockers and have fewer health problems as a result.
"A dog wags his tail with his heart." Max Buxbaum