That may be true. I as well have seen a "ghost" of a small terrier type dog in a house that I lived in as a boy. It turns out my brother has seen the same "ghost" in a separate instance. But all that means to me is that something unexplained has happened. I can't assume that because we have seen a "phantom" that this is the "spirit" of some once-living dog. I am open-minded enough to accept that there is something that remains unexplained. Some people seem unwilling to accept that real phenomena may exist that remain unexplained.