Aww Karen, are you stressed with a lot on your mind? That can really take a toll on your thought process. I know times when I have been particularly under a lot of stress or a lot going on, I keep forgetting things. You didn't mean to leave her out, and I'm sure she was just fine. Don't be upset with yourself. There's been a time or two I put the dogs out and then went to do something else while they were out and forgot they were out. I'd suddenly realize after awhile that they were still out and go to the door and they are standing looking in so bewildered, I just felt SO bad. I know for me, sometimes when I'm trying to take care of the house, my work, errands, so on and so on, my mind can get overwhelmed trying to remember and think of everything.