quote: http://www.featherpicking.com/Basics_of_FP.htm COMMON CAUSES OF FEATHER PICKING The most common causes of feather picking are the following: A. Infectious disease B. Allergies C. Endocrine/Reproductive Disease D. Toxins E. Parasites F. Hypothyroidism G. Primary Skin Infection H. Dietary Deficiencies I. Systemic Disease J. Behavior