I assume these are ex-battery hens, if so they have probably never seen a perch let alone use one. In fact I remove the perches for a couple of weeks until they settle down. I put straw and wood shavings on the floor of the coop, yes they will sleep in the boxes but will soon start to lay in them, again they are only used to laying any place they want. You will also find they need their claws trimming as they will not have been able to scratch around. It may take a couple of weeks for them to get used to their new enviroment, mine have to get used to going up a small ladder into the coop, and the current ones I have have taken about a week to cotton on, although I still have to put one in at night. Hope this helps just takes time.