Beak trimming

Debeaking, also known as "beak trimming" is a process by which parts of the beak of a chicken are removed. This procedure is sometimes used on large farms to prevent cannibalism amongst the chickens, which results from excessively overcrowded confinement. Advocates of the process argue that the side effects of debeaking should be considered collateral damage, since they consider it necessary for mass-production of meat. It is sometimes unfairly compared to the trimming of fingernails, although clipping fingernails does not result in the damage of tissue or nerves. The process leaves chickens inhibited in their abilities to eat, drink, or preen. Several scientific studies, including a study in 1991 conducted by Dr. Michael C. Appleby indicated that the beak is sensitive, and that much pain results from the process of debeaking. When the beak heals, tumors are often formed. Chickens who undergo debeaking show symptoms of chronic pain and depression, according to some behavioral studies.

The debeaking of chickens is sometimes used as justification for a vegan lifestyle, which boycotts the consumption of meat or other animal products.