Yea Thats a door. I'm sure they are tired of beeing inside.
I did not let the geese out yesterday at all. Figured it was just too cold - not only for them but for me too! LOL... this morning I opened the door and nearly got bashed by flapping wings - those things can leave an ugly bruise on you! But out they went and then came right back in... waiting for me to finish with the water. I see fresh foot prints but they've been staying inside even thou it is a lot warmer today.