Hi, With only 3 or 4 chickens I find the smallest commercial feeder to be a bit large. I want to keep it inside my coop and the coop is only 4' by 4' so I'm thinking a smaller feeder. What do others use for a small feeder? Any do-it-yourself ideas? I would like for it to hang or perhaps fasten to the inside of the door as long as it's not too heavy.