Research on dogs being color blind,dogs that eat own poop,how to stop dog from eating poop pineapple - 2016 Feature

Modern science has answered this age-old question: Dogs can see color, but not in the same way that we do.
Rods tell us how bright or dim something is (black or white) and cones help us identify color. The palette of colors they can see is limited in comparison to ours; it is also less vibrant. While they can see blue, they can’t distinguish shades, especially as the color blue gets darker.
There's a common misconception that dogs can only see in monochrome and use varying brightness levels to identify the outlines of items.
There's a common misconception that dogs can only see in monochrome and use brightness levels to see the outlines of items. However, last year scientist Jay Neitz from the University of Washington, carried out experiments on dogs to test this theory.


A team of researchers from the Laboratory of Sensory Processing at the Russian Academy of Sciences tested the sight of eight dogs of varying sizes and breeds.
Scientist Jay Neitz from the American university carried out experiments on dogs to test whether they could see in colour or not. Human eyes contain three 'cones' that can distinguish between red, blue, yellow and green light making it possible to see the full colour spectrum, left. Yet Russian scientists have now proved not only do dogs have a limited colour range, they use this visual spectrum to distinguish between objects and select certain items from a line-up.Previously, dog trainers would avoid using coloured objects when training pets to do certain tasks, but these findings could improve how animals are trained and what they are capable of learning.
Human eyes have three 'cones' that detect colour and can identify red, blue, green and yellow wavelengths created by light entering the eye. Dogs only have two cones, meaning they can't distinguish between red and green and see colours on a blue and yellow scale, rightIt only took three trials for the dogs to learn which colour paper was sat in front of the box containing the raw meat.Once the dogs could identify that a piece of dark yellow paper meant meat was nearby, the researchers wanted to check whether the animals were choosing this paper because of its brightness or its colour. Dogs were trained to learn that dark yellow paper was always put in front of bowls containing meat.


Each dog chose the light yellow paper - meaning they were making choices based on colour - more than 70 per cent of the time.
Neitz discovered that dogs only have two cones - this means they can distinguish blue and yellow, but not red and green.This is the same spectrum seen by humans when they have colourblindness. If the dogs chose the dark blue paper, the scientists could rule that the animals were making choices based on brightness.



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