Does anyone use an automatic door for their duck house? I won a solar powered auto-door in a contest and received it yesterday but I don't know if it's going to be the right size for ducks. The door opening is 10.5" wide and 12.5" tall. Will that work or is it too small for ducks? I was hoping to use the auto-door for them to come & go as they wish into their run (I'd let them out into the garden/yard during the day). The duck breeds I'm getting are: Welsh Harlequin, Khaki Campbell, Indian Runners, Pekin, Blue Swedish, Cayuga, Buff and a hybrid. I can easily find the weight on these but I don't know how tall they are going to be full grown.