Chicken eyeglasses

Beak trimming is often effective in reducing pecking injuries but causes pain and significantly affects chicken welfare.

[7][8][9][10][11] Red-tinted lenses were considered effective in reducing internecine pecking because they disguise the color of blood.

As the hen lowered its head to feed, the lens swung out, giving it an unobstructed view of the ground.

[19] The eyeglasses are no longer produced by the National Band & Tag Company, but are sought as collector's items.

[21] On January 16, 1955, Sam Nadler of the National Farm Equipment Company of Brooklyn appeared on CBS' popular primetime television show, What's My Line?

After the panel was unsuccessful in guessing his occupation, Mr. Nadler's identity was revealed, and he stated that his company sold 2–3 million pairs of chicken eyeglasses annually.

's director, Franklin Heller, said in 1958 that the show's "most unusual occupation" over its then eight-season run was "...the gentleman who makes eyeglasses for chickens.