It's not just serotonin either-most neurotransmitters can cause anxiety or anxiety like symptoms, and in some cases an over-abundance of a chemical can lead to anxiety. So it does appear that you can develop it without experiencing a stressful life.
Howard Heinzl (1918 - 1989) With regard to blue American Staffordshire Terriers, any breeder that believes that a blue American Staffordshire Terrier is some how more valuable than the other recognized colours, is not only deceiving themselves, but they are also deceiving their customers.
People often ask what the difference is between the American Staffordshire Terrier and a pit bull.. First of all, there is not breed called simply a pit bull.. There is, however, a breed called the American Pit Bull Terrier. It is not recognized by the American Kennel Club, but it is recognized by the Continental Kennel Club and the United Kennel Club. Generally speaking, the American Staffordshire Terrier is nearly the same breed as the American Pit Bull Terrier. Today, the main difference is in appearance. The American Staffordshire Terrier is bred in part for AKC conformation and conforms to a stricter standard, particularly in size range.