Accidently acquired a rooster & a chicken & will get 2 more friends for him. Never kept chickens.They can free range on a safe enclosed 300 sq metre area. Rats, mice & maybe the venomous brown snake ( hope not) the only likely visitors.What kind of shelter will they need ? Height, width, off the ground ? Some trees, bushes, climate 10C to 45C degrees so dont want them to fry in summer. Have lots of wood, metal poles, galvanised iron & hardiplank/villa board cladding, tree branches around so can construct. They dont have to be locked in at night. What can I build thats simple but wont look tatty ?