If I remember correctly, I saw this movie on television in the late 1990s or early 2000s. I am fairly sure it was on the Syfy channel but I could be wrong.
All I can remember is that there was an evil ghost dog in the movie that was black (possibly a rottweiler). In one scene, it keeps appearing in the back seat of a mans car and then in the road, vanishing before he runs it over, and it later kills him when he is home. The movie mainly centers around a woman with dark short hair. At the end of the movie, the dog becomes huge and appears to be a giant dog head floating over a house or building and it shoots some kind of lazer or orb into the woman’s head. In the ending scene we see the woman is paralyzed or in a coma because of this. I am thinking that the title was something like “the evil within” or “the beast inside” but I can find NOTHING about it online. I do know that it is not any of the following: ghost dog way of the samurai, rottweiler, mans best friend, devil dog hound from hell