If I wanted to build a coup for 25 birds, how big would it have to be? How many nest boxes? I am thinking I may want to get 25 chicks, 25 banties and 10 ducks... how big would this need to be? THANKS! P.S.- what are the advantages of free ranging/ vs disadvantages? Do YOU free range? Is it true that ducks and gess and guinea have a better chance of survival then chickens?