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.
1 The Staffordshire Bull Terrier The Staffordshire bull terrier, or Staffy, is a medium-sized, solidly built dog. 2  It's part of the terrier group and comes from England. 3  It is very muscular, strong for its siâ¦.