I think that 5 or 4 chickens would be reasonable for the amount of space we can provide. Besides, with as few as 4, i will be able to get to know each one as individuales. But i dont know if the breeds would be compatible. 1 blue silkie bantam 1 white silkie bantam 1 Mille fleur d'Uccle bantam and an Ameraucana bantam. Will the ameraucana bantams still have that hawk like appearence as the standard version? How big should the coop be?