To test their hypothesized solution, researchers used foam stencils to paint black and white or yellow eyes—one eye for each butt cheek—on approximately one-third of the subject cattle.

The “i-cow” method involves applying acrylic paint on the bums of cattle with foam stencils that look like a sketch of an eye. The eyes trick certain predators, such as lions and leopards, that try to ...

painting the cattle in 14 herds (a total of 2,061 animals). They used acrylic paint (black and white or yellow), applied with foam stencils in the shapes of the inner and outer "eye." The colors ...