I have ducks and quail, and I'm thinking of adding a very small flock of free-range silkies. I was wondering if they can stay in our (securely locked) shed at night, where the feed and hay and tools are stored. I thought I'd add a couple nest boxes and put a thin scattering of straw on the wood floor, which I'd sweep out every few days. What do you think? Any problems I should consider? Also, there are a few steps up to the shed--they won't have trouble going up the steps, will they?