Breeds such as labrador retrievers only have two kinds of pigments in their eyes Rex FeaturesDogs can’t tell the difference between red and green, according to the first study that has subjected them to a colour blindness test originally designed for humans. Breeds including labrador retrievers, weimaraners and Brittany spaniels could not make out a red cat running against a green background in a series of tests carried out by scientists in Italy. The findings confirm suspicions that dogs only have two kinds of pigment at the back of their eyes: one for the long and medium wavelengths of light that correspond to red and green, and the other for blue. Sixteen dogs sat between their owners’ legs and watched as a film of a cat was projected on to the wall in front of them. Video footage was analysed…

Source: The Times November 08, 2017 00:22 UTC