Chicken eyeglasses, also known as chickens specs, chicken goggles, generically as pick guards and under other names, were small eyeglasses made for chickens intended to prevent feather pecking and cannibalism. They are colored/tainted in red because it was thought to prevent a chicken wearing them from recognizing blood on other chickens which may increase the tendency for abnormal injurious behavior like cannibalism. The red tainted chicken google does not prevent the chicken from seeing it’s feed or water on the floor.
Chicken goggles are an alternative to beak trimming, which is the removal of approximately one-third of the beak by a cold or heated blade, or a debeaker, usually when chicks are 1-day old. This is often effective in reducing pecking injuries, but causes pain and has significant effects on chicken welfare