hi ali and susi, it will depend on a few factors, size of your hens, will they be allowed to roam the garden during the day and then shut into run/house at night? if their to be kept in a run house combination it will need to be moved regularly so the ground isnt destroyed. they will only use upstairs for roosting at night presume youve got seperate laying box. when roosting they sit close to each other like little soldiers, dont go over what is recommended for your size house. best of luck...............neil