I remember seeing this movie when I was 6 or 7, so it was around 1997-1999. All I can remember is that it was a horror movie about a family looking for their dog, that had turned into a monster and was wreaking havoc. The monster looked similar to a huge reptile or dinosaur. The ending had them finding it in the woods and playing a song to turn it back to normal.
That’s all I can remember and it’s been driving me insane for years.