Dog Day Dreams?

What do dogs dream of during the day? When the parents are at school and the kids are at work, where does the dog go? Of course he's in the living room, but where does the mind of the dog go? Can dogs think? Humans think in a language. So does that mean since dogs have no language they cannot think? If humans had no form of communication we wouldn't be any where near where we are now. Is language what makes Homo sapiens the most advanced species on the planet? Something as simple as language? English and Chem. are a little more closely related than I previously thought. Assuming such a theorem is correct. Maybe in 10,000 years this will be a popular idea accepted by all. Will I be credited? Maybe Darwin wasn't the first one to theorize evolution. Maybe he was just the more literate.