As a few of you may know I pet sit on Sundays apart from my full time job. Every week brings new pets and new houses. I had been to this house before, fairly nice two story house in a decent neighborhood.
Every time I go here it's like I'm a new person to this dog, Lily. She is partially blind, partially deaf, so she is always a little skiddish the first few minutes. What I usually do is sit down in their living room for a few minutes when I first get there and let her warm up to me a bit. As I'm sitting there, I hear a "thud thud thud THUD THUD thud thud thud". It's directly above me, if you've ever lived in an apartment with someone above you, it sounded as if someone was running across the room. It didn't really bother me the first time, startled but for some reason I paid little attention to it, but a few seconds later I heard it again "thud thud thud THUD THUD thud thud thud" going in the opposite direction it did the time before. At this point I was thinking "ok...maybe it's just an animal on the roof".
I had never been upstairs as Lily can't walk up them, but curiosity got the better of me and I decided to see if it was roof above me, or a room. I go upstairs, and sure enough directly above where I was sitting, is a slightly opened door to a room. I usually would never go into a room that doesn't pertain to the animals, but considering it was slightly cracked I figured there was no harm. I opened the door and it was a little girls play room with all these dolls and dollhouses. Not like creepy dolls that would haunt your dreams, just normal little girl dolls.
That's it. I went back downstairs and took care of the dog and didn't hear the steps again, finished up and went to the next house. Just haven't really found a logical explanation to what it could have been, this was about 2 or 3 months ago.