As you know the chickens will choose the higher roost, so the lower roost is not nessecary and is too close to the higher roost anyway. A 2" lip on the edge of the poop board can act as a landing point between the floor and the roosting bar.The poop board is 30” deep & 30” off the floor with a high (12” from wall) roost & the low one is 7” towards the middle from the high one. Is that too close?