Until I have to turn on the heat or the air I like to leave my back door open. It lets in the light, fresh air and it allows Princess and Gracie to be able to go in and out when they want. I went outside with them for awhile and when I came back in I sat down in the family room to read. I heard the dogs come running, I looked up just in time to see a bird fly by, out the door, Gracie running after it and Princess running right behind. Of all things!