Animal Apparitions

I was browsing the forums and something triggered a memory of something that happened to me when I was about 6 or 7 years old. I was sleeping next to my mother on a saturday morning. I used to get out of my bed early and go on into my mothers room for a cuddle haha. Anyway I dropped off to sleep and when I awoke there was a dog next to the bed. The dog was all black and I believe it was a Scottish Terrier however it didnt have the shine of the fur that most other dogs have. Its fur was just a dull black. I reached my hand out to touch it but it didnt move, it was as if it was made of stone. It just sat there staring at the wall almost as if it was staring through the wall. I pulled my hand back under the bed sheets because now I had a feeling of terror and I hid under the blankets. I was under there for 10 minutes and when I peeked out the dog was still there just staring straight at the wall. Finally my mother woke up and got out of bed, I came out from under the covers and the dog was gone.

To this day Im curious as to how the dog got there. Theres no way it came in from the outside because all the doors were locked and I closed my mothers bedroom door after I entered her room in the morning. I had a dog at the time but it was nothing like this dog and was kept downstairs during the night. I dont think this was a dream because I asked myself a few times if i was dreaming. I personally think it was a ghost. Im just wondering if anyone else has experienced anything like this?

Thanks, Matt