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Sites:

Broken Blood Feathers: Cockatiels, Cockatiel, What is a Blood Feather, Broken Blood Feathers, How to Pull a Broken Blood Feather

Clinical Approach to Feather Picking Disorders in Pet Birds: Describes areas of feather picking, if it is behavioral or medical in nature, and how this problem is handled.

Common Skin and Feather Disorders in Pet Birds Part I: Many diseases and disorders can affect your birds skin and feathers, including mites, baldness, cysts and more.

Feather Picking and Self-Mutilation in Companion Birds: Defines this destructive behavior, causes, contributing factors, and recommendations.

Feather Plucking In Parrots: Explains the Causes and Treatment of Feather Plucking In Pet Birds

How to Manage Feather-Picking in Caged Birds: Provides details on the differences between normal preening, lack of preening, and destructive feather picking.

Knemidokiptic Mange in Pet Birds: Scaly Face and Scaly Leg Disease: Describes the lesions of the skin produces by mites and the treatment options for it.

Research on Feather Diseases - Part I: Report on research which took place from 1993 to 1995 on feather diseases in budgerigars.