sw
If my dog (actually I'm between dogs right now) woke me up and I found a door ajar/unsecured, I would be doing a house check to make sure the kids were in and intruders were out.
I woke up one summer morning to find my front door open (it has deadbolts) and my NAKED daughters (2 and 3) riding their trikes around the block. They used the time out chair to reach the doorlock and the gate latch!