Although this is my first post, I've been lurking for a bit. I think something or someone outside caught Lucas's attention. So much so, he didn't think about putting on shoes - he was excited! I think by the time he got the door opened, he had to run after it, or he may have lost sight of it and went looking for it. I think someone said there aren't any septic tanks in the neighborhood but what about other types of holes/enclosures? I think of Jessica McClure & the well. I think of the girl in AL that fell into & drowned in a grease pit. I think of the kid in SW VA that fell into a septic tank & wasn't found for days. Could there be old tanks that no one knows about or have been forgotten? Anything like that? As far as the SAR dog not hitting his scent, that's happened before, too. Where can Lucas be??