FEATHER PECKING AND CANNIBALISM
Regardless of the housing system, feather pecking and cannibalism can be a problem, especially with chickens and pheasants. Prevention is always the key. Make sure that you are following best management practices (BMPs) on housing and nutrition for the species of poultry you keep.
Cannibalism: Prevention and Treatment (Virginia Tech)
Cannibalism in small poultry flocks (Kansas State University)
Cannibalism by poultry (University of Nebraska)
A bad habit egg production flocks can pick up is egg eating. Once it starts it is a hard habit to break. Proper housing, nest design and nutrition are important factors to consider.
Preventing hens from eating eggs (Kansas state University)
Preventing egg eating (Virginia Tech)