[Critter]

I really think they can, both my dogs will sense something in the house, we see them watch areas as if something is moving. Harley who really never growls will sometimes lift his head and start staring at an area and just growl the meanest growl you have ever heard. its a really deep growl too and so out of his character. When he does this I always comment, he must have seen the ghost. My daughter when she was young use to tell us that a man would stand in her door way and watch her at night sometimes. he never entered her room but would stand there and would wave.