So I have spent hours looking at coops and chickens and all the different stuff involved with chickens. One thing I have been noticing on a lot of coops is that so many of them have a shelter that is raised up off the ground. Some are 6 inches some are 2ft or more. Is there a advantage or disadvantage to having them raised. The biggest disadvantage I can see would be in the winter time. Putting cold air all the way around the coop seems it would make it harder to keep warm in cold weather. I'm just trying to take everything into account before I start building mine. Thanks in advance.