Where's Sadie

The other day Sadie was wondering around the house and I could hear her in the background. I had gotten caught up in what I was doing though so I wasn't paying that much attention. After a while I had realized it was really quiet so I went to look for her and I could not find her anywhere. I double checked everywhere I went. I was thinking there is no way she went outside, so where is she? Finaly after looking for a while I decided just in case I would look outside. Payson was outside playing but I couldn't find Sadie. I asked Payson, where's Sadie? He pointed towards the barn, so I went over there and there she was playing in the mud. I still don't know how she got past me. I didn't hear the door open and the door was in my sight. Maybe Payson being the nice brother that he is snuck her outside. I will never know.