Poles should be fine because they are not in constant contact with them on their feet, don't use cedar shaving for any animals the oil in the shavings is harsh on their flesh. Pine shavings are best. Some people like hay or straw for bedding, straw & hay is messy.
Liam,
Flock Masters measurements are very good for that many for a while if you have the room, it is very nice, but if you keep them out side like in the coop or garage I would reccomend either cardboard sides be put up or some sort of sides along with a heat lamp or light bulb, I personally...