Dogs do not see the world in black and white: they see much as a red-green colourblind person does, in blues and yellows — reds and greens simply fade to murky browns and grey, but colour is very much

Dogs do not see only in black and white. That is one of the most stubborn myths in popular biology, and it is wrong. Dogs see colour. Their world is narrower than ours, leaning toward blues and yellows, with reds and greens washing out into dull brow... [3057 chars]