I saw a simple one on YouTube to lift and lower the door on a timer. I have a sliding glass door for the ducks tho.. When are ideal open/close times? I was thinking sunrise&set but now I'm thinking 30 mins after it's completely dark to make no one gets locked out. An automatic timer feeder would be great too. I'm fine for a while but eventually we'll have holidays and travel and I'd rather trust a machine and neighbor than human alone.