Originally Posted by beach tribe
Because dogs actually CAN sense things like that, and therefore their BS acting wouldn't really go along with the dog not reacting to anything.
Dogs can sense a lot of things that people can't. That's doesn't really mean that they're seeing ghosts though. Dogs might be resistant of being in a basement because of a small radon leak or electromagnetic field put off by old heating or cooling systems or electrical systems. Stuff that humans would be unable to detect. Many dogs freak out when going to the vet. I don't see a paranormal link there though.
Dogs are also very adept at perceiving the emotions of their owner. If you're scared shitless thinking about ghosts, your dog is going to sense that fear.