I've just about finished my coop and I have a few questions: 1 - my roost is 20" off the ground. If my chickens have clipped wings, will they be able to get to the roost without a ramp? 2 - my nest box is 18" off the ground with a 4" lip to keep the nesting material in. Will they need a ramp to get in the nest? 3- my pop door is 13" off the ground. Will I need a ramp inside and outside? Sorry no pics yet since it is my first post. I've been lurking for quite a while. This site has an amazing amount of information. Thanks.