Ok. since there's no new guesses I will post the answer. Dog number 14 is the American Pit Bull Terrier
Dog 1 is a American Bully, a relatively new offshoot of the 'pit bull', using larger bully breed dogs to create a larger dog. It is included in this test because it's popularity is high and people assume that it is what a Pit Bull Terrier is.
Dog 2 is an American Staffordshire Terrier. It is a direct offshoot of the American Pit Bull Terrier. They can still be duel registered as the AKC accepts Am Staffs only, and the UKC accepts both. A group of dog fanciers wanted to separate themselves from any association with the term 'pit' so they named their dogs the Staffordshire Terrier, later adding "American" onto it to distinguish them from the Staffordshire Bull Terrier. American Staffs are larger than American Pit Bull Terrier.
Dog 3 is an American Bulldog. A recreation of an old time Bulldog. Used to defend farms and hunt boars. They are larger then the English Bulldog and larger than the American Pit Bull Terrier.
Dog 4 is an Olde English Bulldogge, a further throwback to the olden days. It is a healthy taller version of the English Bulldog that is popular today. The way bulldogs were before breeders put looks over health. Because anyone knows the English Bulldog can be a pricey dog to own with the many health ailments they can get because of poor body shape and muzzle size.
Dog 5 is an Alapaha Blue Blood Bulldog, another lineage traced back to the old southern plantation dogs of the 1700's. Alapaha comes from a river of that name in Georgia. "Blue Blood" is from their noble demeanor. It is finally getting some appreciation and is recognized by the American Rare Breed Association. Smaller than American Bulldogs.
Dog 6 is a Staffordshire Bull Terrier. a smaller stockier bully most popular in England, but does have its admirers in the US. Strong, smart, courageous and a perfect 'nanny' dog.
Dog 7 is a English Bull Terrier. most recognized by its 'egg-shaped head', although over 100 years ago it more closely looked like refined head of the Am staff, they are also bigger than they had been now coming in bigger than the American Pit Bull Terrier. it has all the same character traits as its other bully relatives.
Dog 8 is a Boxer. as the others, originally a fighting breed and now is more of a working/guard dog. Another strongly built dogs, it is most recognized for it's shorter muzzle (although not all Boxers have such a noticeable pushed-in face) Very loyal and protective, well trained and socialized they prove to be wonderful pets for adults and children alike. They are larger than the American Pit Bull Terrier.
Dog 9 is a Dogo Canario ( Canary Mastiff) large Spanish Molosser-type dog breed originally bred for working livestock. They require a strong trainer but when they have one they are great dogs who can live with people, pets and livestock.
Dog 10 is a Cane Corso. A Italian Mastiff. Used and guardian and hunter. Similar to other mastiff such as the one above.
Dog 11 is a Patterdale Terrier. a type of Fell Terrier, used as a small working dog it is a typical terrier and requires good training to prevent impulsive behavior.
Dog 12 is a Labrador Retriever. a strongly built dog used as a gundog, usually retrieving waterfowl. Trained properly they are friendly and goodnatured, but require a good amount of exercise to prevent 'boredom' behavior. They are a slow maturer so they basically remain 'puppies' for longer than most breeds do.
Dog 13 is a Boston Terrier. long ago it was used as other bulldogs, and was taller and stronger than it is now. refined as a companion dog in the US it still holds it bull and terrier qualities.
Dog 14. the American Pit Bull Terrier.

a medium sized bull and terrier. powerful and athletic. it has great confidence and zest for life. because of it's potential for dog aggression it requires an owner who will carefully socialize and obedience train their dog. human aggression is very uncharacteristic and highly undesirable, they were not bred to be guard dogs. they do very well in LEGAL dog sports as agility, obedience and weight pull.
Dog 15 is a Louisiana Catahoula Leopard Dog. named after Catahoula Parish in the state of Louisiana in the United States. descended from Native American-created breeds it is sometimes called a catahoula hound although it is not a true hound, but a Cur. Larger than the Pit Bull, it is well known for having the 'leopard' merle coat but they also come in other colors such as black, grey, brown and tri-color. a protective and alert dog, they need to be well trained and need daily interaction and they do not tolerate being ignored (nor should they have to) They should be considered assertive, not aggressive. That being said, it is a working dog such as herding, (also used for hunting), and if it doesn't have something to do, it will be bored.
this basic test ( i used different pics) is used to show that people can't always pick out what is really the American Pit Bull Terrier. which is the breed that is most targeted by BSL. (Breed-specific Legislation)