presence

I've been having some strange dreams and most of the time my strange dreams are just strange nightmares about nothing that seems to mean much of anything, but these felt different.
Last night, I dreamt that I was at my grandma's house.  I have dreams that take place at her house fairly often but in most of them, I can't find her.  There's a feeling that I just missed her and she never comes into view.
But this one was different as she was actually there and I could see and hear her voice. 
We were getting ready to go somewhere with my grandpa and there was a strange dog outside, it was starving, its hair was falling out, and its skin was red.  Somehow, it had gotten into the backyard and was waiting at the door to be let into her "Florida room" as we called it.
But of course, all the pekes were out there and that wasn't going to happen.
A very strange person showed up all of a sudden and seemed very ominous and threatening.  I can't remember if he even spoke but we were afraid to leave with him there.
I don't remember much of anything else from this dream.
I don't have a clue what it means. But when I woke up, despite it being such an anxious dream, I felt comforted by the fact that my grandma was actually present in this dream.
In the ones I usually have with her, it's anxiety inducing, trying to find her and talk to her.
I usually wake up sad and stressed.