We are getting some property soon and want to build a barn for our goats and we are thinking of incorporating a stall into a coop. We are thinking of space for 20ish chickens eventually. How would you do that? We are building from scratch so any suggestions would be welcome. What size? Ventilation issues, pop door, they will have access to outside pasture with the goats. We want to do a locking feed room inside the barn and milking parlor as well. Thanks!