Can dogs only see black and white?

Answer

According to Pedigree.com, dogs have limited color vision - their eyes have 20 percent of the number of color receptors present in human eyes. Dogs see shades of yellow and blue, but are unable to differentiate between colors ranging from green to red. Dogs perceive red as brownish-gray or black.

As nocturnal hunters in the days before domestication, dogs have much better night vision than humans. Additionally, they are better able to detect motion. While their eyes are more proficient in hunting-related needs, dogs are estimated to have 20 to 40 percent of the visual acuity as humans, rendering what they see as blurry.

Reference:
Q&A Related to "Can dogs only see black and white?"
Cones are photoreceptor cells in the retina of the eye that function best with bright light. Dogs have two cones, while humans have three different cone types. Each cone contains
http://www.ehow.com/facts_6760422_do-see-only-blac...
Actually, that is a bit of a myth. Dogs have dichromatic sight, which means that although they are definately color blind, they see in shades of yellows and reds.
http://www.ask.com/web-answers/Science/Nature/why_...
People don't. And dogs don't only see in monochrome. Not in my experience anyway. I have owned dogs that could tell the difference between a red, blue, white, or black ball, as well
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In Recent experiments they found out that Dogs do see color, but in a more
http://www.chacha.com/question/why-can-dogs-only-s...
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