I am repurposing my kids old "fort"/ playhouse and I want to know can chickens climb stairs? do I have to make a ramp up into the coop or will they be able to go up the stairs to get in?? attaching photos so you can see what I am talking about ... there will be a half door top half on hinges the bottom will be a sliding pocket door for the residents. Also any opinions about the roost poles do they looked spaced right ??