and a tough surrounding membrane. Therefore, it cannot expand freely.
Mississippi State University Extension explains that increased pressure inside the tender can restrict or stop its blood supply. The resulting oxygen shortage then causes localized tissue death.
Wing flapping plays an important role because vigorous muscle contraction increases the demand for circulation. Researchers and poultry specialists have associated increased activity with the development of the condition.
Several situations can encourage wing flapping. For example, sudden disturbances, excessive noise, lighting changes, catching, handling, and other events that increase bird activity can
