DOGS FOUND COLOR-BLIND — Some animals are able to distinguish colors but others are practically color-blind, Dr. Gerti Duecker, zoologist of the University of Muenster, West Germany, has determined by a series of tests. Dr. Duecker found cats and dogs to be color-blind, although there is some evidence that some dogs have a faint sense of color. The color vision of mice, rats and rabbits is also not positive. The golden hamster and the opossum are definitely color-blind. Horses, deer, sheep, pigs, squirrels and martens can perceive colors, but only in certain parts of the spectrum. A few species are receptive only to reds and greens.... Most monkeys and apes resemble man in their capacity to see colors, and the chimpanzee is the most versatile of all.
50 Years Ago