Jul 20, 10
Read from June 15 to July 20, 2010
Dogs aren't color blind. They have 2/3 of the cones that we have and can distinguish blue from a field of grass for example, but not red or orange.
Dogs have been genetically evolved to be much closer to being human than their ancestors. It's not inaccurate to attribute human like qualities to them, ie, "It's just a dog" has little scientific basis. It's only been relatively recent, 1990's that the public is better informed in this way.
Plato was more accurate on the subject than the common person in the 1800's.
(Things took a wrong turn for dogs when Descart contributed uninformed perspective on the subject of dog intelligence and emotions.)
Caveat: I have two very intelligent and sensitive dogs, a rescue herding mix, and a Labrador retriever, so of course I gravitate towards information that confirms my personal bias.
For people who believe everything the Dog Whisperer, Caesar Milan, says, take it with a grain of salt please. I used to think he was the last word, and still appreciate his shows, but some of it is a bit off the mark.