It’s well known that dogs don’t see as many colors as we do – similar to color blindness in people. Whereas humans have three types of cones in our eyes, allowing us to identify combinations of red, ...

Dog eyes have more rods than humans ... Some experts think it could be blue and yellow. Alexandra Horowitz — author of "Being a Dog" — told us that it's difficult to know exactly what colors ...

Their eyes have fewer types of color-sensitive cells ... colors associated with beneficial or essential resources. To a dog, yellow might signal something valuable — food, safety, or comfort.

Prior research has shown that dogs have just two types of cone photoreceptors in their eyes compared to the three ... Dogs see the difference between blue and yellow, for example, but other ...