Beak trimming in layer hens has been historically performed to reduce undesirable behaviours such as feather pecking and cannibalism. The morphological alteration involves partial removal of the upper and lower beak by using hot blade (HB) or infrared (IR) trimming devices. It is generally performed early in the life of egg-laying hens.

Here is a link to a video that shows infrared trimming method.

https://www.youtube.com/watch?v=mnQWK_RR75k

Even though pecking in chickens is natural behaviour, injurious pecking is associated with both economic implications for the producers and welfare implications for the chickens. Moreover, feather pecking can inflict trauma and outbreak of cannibalism that is painful for the receiving hens. Regardless of the resulting benefits to improve the well-being of laying hens, the stress and pain associated with trimming have become the scrutiny from the general public and animal welfare advocates.