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.
Staffordshire Bull Terrier Vs. Staffordshire bull terriers are smaller than American pit bull terriers. Staffordshire bull terriers and American pit bull terriers -- commonly known as pit bulls -- may look similar at first glance, but they're two distinct breeds. Although both types of dogs sometimes get a bad rap, they can make loyal and loving pets if properly trained and socialized.