Evolution of the dog?

http://www.youtube.com/watch?v=qXo3NFqkaRM Is it conceivable for dogs to one day talk to us?

I doubt they have the mental capacity to fully understand vocabulary, but orangutans can be trained to use sign language to talk. I heard there was one who voiced its opinion on what death is like. It said that death was like sleeping.

You mean, signed it's opinion.