Hello, I want my ducks to be outside during the day and locked in their pen at night, so I installed an automatic door opener. Right now, I use the door opener manually, I lure them into the pen at dusk by feeding them in there to get them accustomed to stay in there during the night. In the morning I let them out. However, I don't know how to make them go inside on their own. I'm pretty sure they would stay outside, if I wouldn't come and feed them. Does anyone use an automatic door opener with ducks succesfully?