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.
The Boxer is a breed of medium-sized, short-haired dogs developed in Germany. Their coat is smooth and tight-fitting; colors are fawn or brindled, with or without white markings, which may cover the entire body, and white.oxer is also the name of a dog owned by John Peerybingle, the main character in the best-selling 1845 book The Cricket on the Hearth by Charles Dickens, which is evidence that Boxer was commonly used as a dog name by the early 19th century, before the establishment of the breed by the end of that same century.