We will be building our coop for a group of all standard sized Cochins. I was wondering, since they will be such nice round ladies when they grow up if they would be more comfortable with lower nesting boxes and roosts. I read somewhere that the heavy breeds don't tend to try to fly up to much so I was wondering if lower was better and if so how low should we go? Nest boxes on the floor of the coop? Roosts 18" maybe? Any advice is appreciated.