Definitely piss around on Yahoo Answers asking random strangers to diagnose your unresponsive dog….
Your dog is not responding and your first thought was to get on the computer??? Why???
Get your dog to the vet and get yourself some common sense.
Take him to a vet ASAP…. treat it like if a kid were in the same boat.
He may have a broken skull, take him to a vet NOW
And you need people on here to tell you that you should get your dog to a vet !!!