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 breed is classified by AKC as the âAmerican Staffordshire Terrierâ, and is referred to as the âAmerican Pit Bull Terrierâ by the UKC. Generally, American Staffordshire Terriers have larger heads and are heavier than American Pit Bull Terriers.