picage

CONT: Dans les grands élevages de poules, le picage peut se transformer en cannibalisme. On l'attribue le plus souvent à une ration mal équilibrée, à la surpopulation ou à l'oisiveté.
OBS: Comportement anormal des volailles.

CONT: Feather picking, or feather pulling in poultry and in cage birds(...) is in many cases due to the irritation caused by lice or to the ravages of the depluming mite (...) It occurs in birds penned up, due to a lack of exercise and facilities for scratching, to keep them occupied (...) Once the birds start pulling the feather they sooner or later draw blood, and an outbreak of cannibalism results (...).
OBS: An abnormal behavior in poultry.