Ok - I'm in the idea/design phase of putting together a great chicken coop for two soon to be hens in my suburban neighborhood. What important features for me to design into this small two hen coop? Things I know I need -- Place for them to roost -- place for them to nest - place to eat and drink. Anyhting else? I searched and saw lots of great exterior shots of coops -- but less about the insides. Maybe because there isn't much to them and I ma just over complicating things -- I do that How about automatic feeders and heated water buckets? Are ther DIY versions of these that people have already figured out?